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Is Extraterrestrial Life More Whimsical Than Plausible?

coondoggie writes "Princeton University researchers are throwing some cold water on the hot notion that astrobiologists and other scientists expect to one day find life on other planets. Recent discoveries of planets similar to Earth in size and proximity to the planets' respective suns have sparked scientific and public excitement about the possibility of also finding Earth-like life on those worlds, but the expectation that life — from bacteria to sentient beings — has or will develop on other planets as on Earth might be based more on optimism than scientific evidence."

247 of 344 comments (clear)

  1. Paywall ... by Anonymous Coward · · Score: 5, Funny

    is keeping us from discovering extraterrestrial life.

    1. Re:Paywall ... by Dahamma · · Score: 4, Informative

      Don't worry, finding an in depth article about astrobiology on *Network World* is even less likely than finding extraterrestrials on Mars.

      Even better is that the submitter *works* for Network World - either he doesn't understand his own site's paywall, or it's one of the worst slashvertisements in a while...

    2. Re:Paywall ... by siddesu · · Score: 5, Informative

      And it is a paywall to a blog. What kind of world are we living in these days? Anyway, I suppose this: https://www.princeton.edu/main/news/archive/S33/52/89I01/ is the news the article was supposed to link to.

    3. Re:Paywall ... by jdgeorge · · Score: 3, Funny

      ...either he doesn't understand his own site's paywall, or it's one of the worst slashvertisements in a while...

      Well, it wasn't blocked by Adblock, so I'd say it works pretty well.
      Wait... does that "disable Advertising" checkbox remove things like this?

    4. Re:Paywall ... by siddesu · · Score: 5, Insightful

      And having read the link, I can only say that my own statistical analysis shows with a high degree of confidence that every earth-centric or earth-is-unique argument made so far has been proven wrong. Therefore, expectations that this particular view will endure are probably based on optimism rather than evidence.

    5. Re:Paywall ... by LifesABeach · · Score: 1, Funny

      I was reminded of what Carl Sagen said of Princeton University researchers, "It's an awful waste of space."

    6. Re:Paywall ... by mosb1000 · · Score: 1

      Isn't the idea that other planets found in a star's habitable would be earth-like and have life also somewhat earth-centric? The whole point of the article is that without more information, there is no way to know how prevalent life may be in the universe.

    7. Re:Paywall ... by hairyfeet · · Score: 4, Insightful

      I think Neil DeGrasse Tyson explained it simply, I paraphrase "We are made out of the most common elements in the universe. Only the height of arrogance would say that life couldn't happen anywhere but here". Of course the bigger problem would be that if you actually DID have a race that was able to master space and time what would you talk about? Check out his thoughts here, quite interesting.

      --
      ACs don't waste your time replying, your posts are never seen by me.
    8. Re:Paywall ... by siddesu · · Score: 1

      Why would it be? Life is a series of complex chemical reactions. Proposing that it is not possible to have similar sequences elsewhere strikes me as earth-centric, not the opposite.

      Besides, this "result" isn't anything new or unexpected. You can see it easily if you just look at the Drake equation (https://en.wikipedia.org/wiki/Drake_equation#The_equation). At this time, we can pretty well estimate the first two terms, and have not enough ata about the last four, but we can say with confidence that if you put larger number in the last four items, you will obviously get a larger estimate. And we can do that without any complex mathematical analysis.

      So, IMHO, there is very little of value in this kind of modelling.

    9. Re:Paywall ... by tehcyder · · Score: 3, Insightful

      "We are made out of the most common elements in the universe. Only the height of arrogance would say that life couldn't happen anywhere but here".

      It's not arrogance to say that you should only believe in the existence of something if there's evidence for it.

      Otherwise it's just a form of religious faith.

      To borrow a familiar example, Bertrnd Russell's teapot orbiting the Earth could be made out of common elements too. That doesn't mean it exists.

      I don't see any way at present of estimating the likelihood of extraterrestial life existing somewhere. I'm sure it does, but that's only a belief in the absence of evidence..

      --
      To have a right to do a thing is not at all the same as to be right in doing it
    10. Re:Paywall ... by tehcyder · · Score: 1

      The problem with the Drake equation is that it simply begs the question.

      Until we have evidence to the contrary, there is no way of placing a value other than zero on any of the last four terms.

      In other words, we will need to discover intelligent extraterrestial life before we can calculate how likely it is that we will discover intelligent extraterrestial life.

      --
      To have a right to do a thing is not at all the same as to be right in doing it
    11. Re:Paywall ... by siddesu · · Score: 1

      I am not claiming anything different, I'm just saying that the conclusion of TFA is obvious from the Drake equation even without the complex analysis. If you have good data on the first two terms, and only assumptions about the rest, it is kind of obvious that the stronger your assumptions are, the higher your estimates will be. So, the question is really what is the novelty and the value of the article research? I think they are just stating the obvious in a needlessly complicated way.

      Also, the person who replied to you before me is right, we are not standing in place, but slowly filling in the gaps with data, which, unlike TFA is useful research.

    12. Re:Paywall ... by tbannist · · Score: 2

      "We are made out of the most common elements in the universe. Only the height of arrogance would say that life couldn't happen anywhere but here".

      It's not arrogance to say that you should only believe in the existence of something if there's evidence for it.

        Otherwise it's just a form of religious faith.

      Dr. Tyson isn't saying you should believe that there is any specific life out there. He's saying you shouldn't believe that there is no life out there. Any reasonable, sceptical, person has to acknowledge that there is a reasonable chance that life exists on other planets. Accepting the possibility that other life may actually exist is fundamentally different from firmly believing it exists. To continue you religious analogy: Dr. Tyson seems to be saying we should be extraterrestrial life agnostics until we get better information.

      --
      Fanatically anti-fanatical
    13. Re:Paywall ... by hairyfeet · · Score: 1

      Exactly, one of the thing I have always liked about Dr. Tyson is he makes it quite clear that he doesn't expect you to "believe" anything, In his amazing meeting he even talks about how blind belief can hold back an entire culture, as with how a single cleric who released an edict that said basically "All non natural numbers are evil" and killed science in Islam to this very day. But one CAN look at the data we have, of how common the elements that make up life are in the universe and how huge the number of planets are and figure the odds. Sure it is always possible that somehow in defiance of the odds we are the only creatures in the entire universe, but the odds are so badly against that being true I don't see how it could be the case.

      of course that does NOT mean little green men are landing in AL looking for some BBQ and to fuck with the cornfields for shits and giggles. it simply means that the odds are there is life of some sort out there. Personally after what we have seen of Ganymede and Europa I hope that we will take a closer look at both as it may turn out we aren't the only life in this solar system, much less the galaxy. What amazes me is how many hear the word "life" and think little green men. On Ganymede it would probably be bacteria and with Europa being a big ocean it would most likely take the form of some tubeworm style life. while we of course wouldn't be having conversation with either that doesn't mean we shouldn't seek out such life, if for no other reason than it could answer so many questions about how life began here.

      --
      ACs don't waste your time replying, your posts are never seen by me.
    14. Re:Paywall ... by bruce_the_loon · · Score: 1

      Whether you assume the values are zero or assume the values are high doesn't make the assumptions any different or stronger. They are still assumptions and will remain that way until proven.

      Also, absolute waste of research money, they probably started out on religion and then did a find/replace with alien life.

      --
      Trying to become famous by taking photos. Visit my homepage please.
    15. Re:Paywall ... by siddesu · · Score: 1

      The people in TFA have not presented any evidence that supports their idea that life is rare, they just purport to show that the 'real' probability of life and our guesstimate of it are not correlated. Which is a truism, not an insight.

      Then they proceed to conclude 'therefore our estimates are too high', but they do so basically based on nothing.

      That is, their conclusion is, err... philosophical, not scientific. I.e. my analysis of it in the context of all other such statements is about 100% relevant and correct, as is my statistical conclusion that it is not likely to hold.

  2. Bad link by Anonymous Coward · · Score: 2, Informative

    Looks like the article is behind a paywall.

  3. It's not Optimism, by CanHasDIY · · Score: 4, Insightful

    It's statistical probability, you Philistine!

    --
    An enigma, wrapped in a riddle, shrouded in bacon and cheese
    1. Re:It's not Optimism, by noh8rz3 · · Score: 1, Funny

      on the one hand, the Bible doesn't say anythinga bout other worlds, but on the other hand, I think God would wnat there to be many worlds. So, a tossup?

    2. Re:It's not Optimism, by CanHasDIY · · Score: 4, Insightful

      It's statistical probability, you Philistine!

      "The researchers used a Bayesian analysis—which weighs how much of a scientific conclusion stems from actual data and how much comes from the prior assumptions of the scientist—to determine the probability of extraterrestrial life once the influence of these presumptions is minimized." Source

      ...possibility of also finding Earth-like life on those worlds

      Whoever said extraterrestrial life had to be "Earth-like?"

      Thus is the fallacy of the analysis.

      --
      An enigma, wrapped in a riddle, shrouded in bacon and cheese
    3. Re:It's not Optimism, by Tmann72 · · Score: 5, Informative

      Which means nothing. The primary focus of the argument was more specifically the fact that just because life here started so quickly doesn't mean its a good expectation that life occurred as quickly anywhere life is supportable in the universe. Perhaps we were a statistical outlier and we had life appear far faster than the average. The fact is we just don't know, but because we don't know we can't make the assumption that life is on every earth-like planet.

    4. Re:It's not Optimism, by Anonymous Coward · · Score: 3, Funny

      We're talking Science here. Leave your absentee landlord out of it.

    5. Re:It's not Optimism, by Anonymous Coward · · Score: 5, Insightful

      It's statistical probability, you Philistine!

      "The researchers used a Bayesian analysis—which weighs how much of a scientific conclusion stems from actual data and how much comes from the prior assumptions of the scientist—to determine the probability of extraterrestrial life once the influence of these presumptions is minimized."
      Source

      Which amounts to, "my filter hasn't found any papers on extra-terrestrial life we've found yet, so clearly no evidence of extra-terrestrial life exists." I don't need a Bayesian filter to figure that one out, and it's actually pretty stupid to use one. We already know that we haven't found any life outside the Earth.

      That said, the existence of life on Earth is all the evidence you need for life elsewhere. The chance of life arising is bigger than zero, and the amount of planets is large enough that for anything with probability not zero, it's going to happen more than once. The only valid question is just how full of life is the universe? Is it mostly lifeless or chock-full of it?

    6. Re:It's not Optimism, by h4rr4r · · Score: 1

      What does your work of historic fiction have to do with this?

      Why bring up some unrelated literature?

    7. Re:It's not Optimism, by geekoid · · Score: 1

      earth like as in "wet and 'warm'."

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    8. Re:It's not Optimism, by MobileTatsu-NJG · · Score: 1

      It's statistical probability, you Philistine!

      Heh. Well, to be fair, that probability is a measurement of what we don't know, not what we do know, so all of the elements used in determining how probable it is that ET life exists ends with something like "hopefully..."

      The point I'm getting at is that 'statistical probability' is going to change a LOT once we start getting out there. In that case, it may very well be fair to call that 'optimism'.

      --

      "I like to lick butts!" by MobileTatsu-NJG (#32700246) (Score:5, Informative)

    9. Re:It's not Optimism, by CanHasDIY · · Score: 1

      Are you sure it's not Earth-like as in "carbon-based" or "oxygen-loving?"

      I don't know, as the summary's reference article is paywalled.

      AC's source makes no mention of the terms 'wet' or 'warm.'

      --
      An enigma, wrapped in a riddle, shrouded in bacon and cheese
    10. Re:It's not Optimism, by networkBoy · · Score: 4, Insightful

      If you are willing to stipulate that God exists this actually makes for an awesome thought experiment.
      Would God, being omnipotent and omnipresent want multiple worlds of beings?
      What if he was curious* as to silicon based life, that would appear to be incompatible with a world configured for carbon life, so he would need to spin up another world.
      What if God wanted a world of fire to play with creatures for whom consciousness existed in the flickering of flames?
      There appears to be no reason why he wouldn't want other worlds, of course there is also no reason why he would either.

      Imagine the possibilities, something akin to the final scene of MiB where the galaxy is really in a marble being played with, maybe there are other marbles?

      Whether or not you choose to believe is a decision only you can make, doesn't mean you can't have fun with various viewpoints. That said, I think the God talk on /. is the new troll. Guaranteed to get a response every time ;)
      -nB

      * Of course being omnipotent means there is no curiosity, as God already knows everything... Thus why bother with the first world (assuming that's us) in the first place?

      --
      whois gawk date unzip strip find touch finger mount join nice man top fsck grep eject more yes exit umount sleep dump
    11. Re:It's not Optimism, by wcrowe · · Score: 1

      They've thought of this.

      FTFA:

      "Our analysis suggests that abiogenesis could be a rather rapid and probable process for other worlds, but it also cannot rule out at high confidence that abiogenesis is a rare, improbable event," Spiegel said. "We really have no idea, even to within orders of magnitude, how probable abiogenesis is, and we show that no evidence exists to substantially change that." ..also...

      "It could easily be that life came about on Earth one way, but came about on other planets in other ways, if it came about at all. The best way to find out, of course, is to look. But I don't think we'll know by debating the process of how life came about on Earth."

      --
      Proverbs 21:19
    12. Re:It's not Optimism, by 0111+1110 · · Score: 1

      Just as we can't make the assumption that life is on every non-earth-like planet. In fact making any assumption about extraterrestrial life whatever is pretty silly and certainly not science. More philosophy or religion than science. Perhaps a few hundred thousand years after we develop a practical interstellar space drive we will have some evidence upon which to base a conclusion. Until then the most scientific thing one can do in response to the question of life on other planets is to STFU. Which, for some reason these so called scientists chose not to do. Perhaps they are trying to get funding for some project of theirs.

      --
      Quite an experience to live in fear, isn't it? That's what it is to be a slave.
    13. Re:It's not Optimism, by ewieling · · Score: 1

      I've seen various estimates of the number of "earth-like worlds out there. Assuming there are between 2 and 10 BILLION earth-like worlds in our own galaxy and there are between 100 and 500 BILLION galaxies, I think assuming we are the only life in the entire universe is very arrogant of us.

      --
      I really shouldn't have used someone else's email address for this account.
    14. Re:It's not Optimism, by networkBoy · · Score: 1

      Actually there is a statistical probability value that would account for earth being the only planet with life. if the probability is 1/(habitable planets) then we would expect that we are the only ones. So it is not a done deal, though in spirit I do agree with you that it is likely to have happened/will happen somewhere else.
      -nB

      --
      whois gawk date unzip strip find touch finger mount join nice man top fsck grep eject more yes exit umount sleep dump
    15. Re:It's not Optimism, by CanHasDIY · · Score: 1

      Fair enough.

      --
      An enigma, wrapped in a riddle, shrouded in bacon and cheese
    16. Re:It's not Optimism, by MozeeToby · · Score: 2

      Well that depends on what you mean by "earth-like" and what you mean by "had to be".

      If "had to be" is taken to mean is most probably and "earth-like" is using the unique ability of carbon to form a ridiculous variety of molecules then your question becomes:

      Who ever said that extraterrestrial life was most probably carbon based?

      And the answer to that is virtually every biologist who's ever thought about what alien life would look like at the bio-chemical level.

    17. Re:It's not Optimism, by g2devi · · Score: 1

      Not really a new idea. If you look at medieval maps of the world, you'd regularly see things like "Here be dragons" and other sorts of odd human-like creatures in the less explored areas of the map. Look at Gulliver's Travels. It contains more than a few non-human creatures with intelligence in the distance. Yes, those were islands on earth, but sea voyage was the space travel of that age.

      More significantly, Saint Thomas Aquinas deal this this issue in the 12th century:
      http://dermottmullan.com/aquinalien.htm
      http://www.unav.es/cryf/extraterrestriallife.html#texto4

      In short, there is no reason to believe that God is limited to just humanity and there are no implications to Catholic Theology if the universe is teeming with life.

      Given that the universe is made for God's glory, it would be presumptuous of us to automatically assume that we're the only ones here, even if it ultimately turns out to be true. But given the size of the universe, this will likely remain an open question if we never achieve first contact.

    18. Re:It's not Optimism, by CanHasDIY · · Score: 1

      If "had to be" is taken to mean is most probably and "earth-like" is using the unique ability of carbon to form a ridiculous variety of molecules then your question becomes:

      "most probably" is not a synonym to "has to;""Required to be" would be a more accurate descriptor.

      And the answer to that is virtually every biologist who's ever thought about what alien life would look like at the bio-chemical level.

      Whose research is solely performed on terrestrial, carbon-based lifeforms. Which makes their opinions on the topic of extraterrestrial life moot.

      --
      An enigma, wrapped in a riddle, shrouded in bacon and cheese
    19. Re:It's not Optimism, by Dahamma · · Score: 1, Insightful

      Given that the universe is made for God's glory

      What does that even mean? If God is omnipotent, why does he need the glory? And why does he seems to need everyone to love him? If this dude is real, he has one serious inferiority complex.

    20. Re:It's not Optimism, by Bill,+Shooter+of+Bul · · Score: 1

      Is historical fiction any less reliavent than bringing up science fiction?

      --
      Well.. maybe. Or Maybe not. But Definitely not sort of.
    21. Re:It's not Optimism, by TheRaven64 · · Score: 5, Funny

      Reading the bible, it's clear that God is deeply insecure and has about the emotional maturity of a two year old right through the old testament. In the new testament he gets laid and turns into a hippy.

      --
      I am TheRaven on Soylent News
    22. Re:It's not Optimism, by NemoinSpace · · Score: 2

      It may be a statistical probability, but scientifically it is actually closer to an impossibility. % of heavy metal stars, that are not binary, have rocky planets, that contain liquid water, and even in the habitable zone of their own galaxies. Which are occupied by beings which: haven't been made yet, haven't gone extinct. The fact that WE exist at all is the dirty little miracle some scientists admit, but most are embarrassed by for some reason.
      Philosophically, this is a wonderful question but those who rely on statistics should do a little more science.
      Life is hard!

    23. Re:It's not Optimism, by 0111+1110 · · Score: 4, Insightful

      Garbage in garbage out. There is currently insufficient data upon which to base any sort of 'estimate'. There is currently no way to know how many earth-like worlds there are in the galaxy. It certainly seems likely that the number of earth-like worlds in any galaxy would be a non-zero number, but currently all we can do is speculate wildly. So far we haven't found even one other earth-like world. All we have found is that there seem to be a large variety of planets orbiting many, perhaps most, stars at a large variety of orbital distances, including some in the goldilocks zones. Now we have some evidence from which we can conclude that planets are relatively common, but we simply cannot say how common earth-like water planets are.

      --
      Quite an experience to live in fear, isn't it? That's what it is to be a slave.
    24. Re:It's not Optimism, by HiThere · · Score: 2, Interesting

      If "he" were "real", he'd have more problems than that. Just imagine what would cause an omnipotent intelligence to have that kind of raving paranoia.

      FWIW, I'm quite convinced that gods are real, but also that their reality is as a kind of mental sublayer roughly analogous to Jungian archetypes. Think of them as the microcoding of the minds, not only of humans, but of at least all mammals. Occasionally we externalize these mental processes, and they can be *extremely* impressive. But don't expect them to "think", merely to make assertions which are directly experienced with *very* strong emotional charge. Some of them assert that they are omnipotent, but asserting something doesn't make it true.

      P.S.: Various mystical traditions contain exercises which increase the probability that you will experience such an encounter, but it can also happen by "accident". If you do, the encounter that you experience will be in harmony with your model of the world (though it may drastically reorient it). Thus I experienced, at one time, an "entity" telling me that it would protect me, and to prove it, I should remove my hands from the steering wheel. (I was driving down the freeway at the time.) The emotional charge was such that I would have been quite willing to do so. My ingrained skepticism was such that I didn't put matters to the test. But then I had already discovered, in earlier "training", that "The gods make mistakes!". (This was quite a painful realization, so much so that even a couple of decades later recalling it brings my eyes to the edge of tears.)
      N.B.: Simple intellectualization will not prepare you for a direct encounter with a god. The encounter _WILL_ overwhelm your emotions.

      --

      I think we've pushed this "anyone can grow up to be president" thing too far.
    25. Re:It's not Optimism, by amRadioHed · · Score: 1

      Nope, I am always annoyed at posts mentioning similarities to sci-fi.

      --
      We hope your rules and wisdom choke you / Now we are one in everlasting peace
    26. Re:It's not Optimism, by HiThere · · Score: 2

      Various chemistry teachers have said that. Carbon atoms have an unusual ability at linking together in various ways to form large, complex, molecules. Silicon, e.g., just isn't in it. (Not that silicon is an impossibility at considerably higher temperatures, but it would also require a considerably stronger gravity, as it needs to work through silicones rather than via Si-Si linkages.)

      IOW, Carbon based life has lots of advantages, and it more likely in more environments than other possibilities. It is true, however, that our current chemistry is tuned to the temperatures and pressures of our current planetary home. Colder planets would need a more reactive chemistry, and hotter planets would need a less reactive one. Also that hotter planets need to have a higher gravity, so that they don't lose elements essential to making the things that we have been able to construct. If it can't hold onto Hydrogen, then a totally different chemistry is needed. For low gravity planets that means being able to at least hold onto water.

      So the most likely silicon based life that I can think of is based around integrated circuits.

      --

      I think we've pushed this "anyone can grow up to be president" thing too far.
    27. Re:It's not Optimism, by amRadioHed · · Score: 1

      Why rule out all binary star systems? Most stars in the galaxy are binaries and yet there is no reason why if a pair of stars are far enough apart or close enough together that a planet could exist in a stable orbit in a habitable zone. Is there?

      --
      We hope your rules and wisdom choke you / Now we are one in everlasting peace
    28. Re:It's not Optimism, by QuantumLeaper · · Score: 2

      "Is God willing to prevent evil, but not able?
      Then he is not omnipotent.
      Is he able, but not willing?
      Then he is malevolent.
      Is he both able and willing?
      Then whence cometh evil?
      Is he neither able nor willing?
      Then why call him God?"


      by Epicurus

    29. Re:It's not Optimism, by Just+Some+Guy · · Score: 1

      This argument makes zero sense, you have no idea the chances of life arising, it COULD be 50 orders of magnitudes smaller than the number of planets.

      ...in the observable universe, which is, of course, dwarfed by "infinity" (assuming current cosmology is reasonably accurate).

      --
      Dewey, what part of this looks like authorities should be involved?
    30. Re:It's not Optimism, by Jeremi · · Score: 1

      Why bring up some unrelated literature?

      Heh, why do you think? (I'll give you a hint, the reason is listed in the moderation-options menu, and it starts with the letter 'T')

      --


      I don't care if it's 90,000 hectares. That lake was not my doing.
    31. Re:It's not Optimism, by giorgist · · Score: 1

      God would be Omniscience, i.e. all knowing in space and time. That would mean he is not playing with Plado seeing what happens when he breathes life. He would know what happens. I am not sure what Gods motives would be.

    32. Re:It's not Optimism, by Internetuser1248 · · Score: 1

      "We really have no idea, even to within orders of magnitude, how probable abiogenesis is, and we show that no evidence exists to substantially change that." ..also...

      Would someone like to calculate how many orders of magnitude of improbability you would need for there to be absolutely no life anywhere outside of earth?

      Given the size of universe that the current evidence suggests, and the number of galaxies in it, and the number of stars in each galaxy, and the number of planets around the stars, all of which we have some evidence of, I think we are talking some pretty high numbers.

    33. Re:It's not Optimism, by cffrost · · Score: 1

      Given that the universe is made for God's glory

      What does that even mean? If God is omnipotent, why does he need the glory? And why does he seems to need everyone to love him? If this dude is real, he has one serious inferiority complex.

      Parent asks valid questions, and made an observation I tend to agree with. How is this Flamebait? Presuming a believer censored this, wouldn't this be Lightningbait? Or are the flames in this case representative of the eternal damnation Dahamma, myself, and others face for asking forbidden questions?

      --
      Thank you, Edward Snowden.

      "Arguments from authority are worthless." —Carl Sagan
    34. Re:It's not Optimism, by mosb1000 · · Score: 2

      The odds would have to be astronomical, which isn't actually all that unusual in the universe, as it does exist on an astronomical scale.

      You can't just say, "the universe is very big, so there must be other life out there" any more than you can say a container is very large and so must contain what you are looking for.

    35. Re:It's not Optimism, by swalve · · Score: 1

      If God is omnipotent, why does he need the glory? And why does he seems to need everyone to love him?

      Because he's not getting any pussy.

    36. Re:It's not Optimism, by mosb1000 · · Score: 1

      But that just makes's the poster's point. We don't even know how big the universe is, or whether it is infinite. So if you wanted to do a calculation, not only do you not know the probability that life will exist on a particular planet, you don't even know the number of planets to multiply that probability by. And it doesn't matter if the number could be arbitrarily large, as you contend, because the probability could still be small enough that there is only one planet with life, since you don't know what it is.

    37. Re:It's not Optimism, by MadElf · · Score: 2

      I refer you to Nick Bostrom's http://www.simulation-argument.com/simulation.html. The rest of the site is also somewhat interesting.

      Anyway, in summary...

      So, God could be a teenage AI (which, culturally corrected, could be aeons old and unfathomably wise - or not), running a universe simulation on his gaming rig.

      If the rig has enough memory and "CPU", and the simulation allows for it, we may not be alone.

      The motivation may be entertainment, or indeed eventual companionship - reproduction.

      The prevailing cultural ethos may allow for baby AIs with promising ethical or intellectual makeups to "score" highly enough, possibly through multiple incarnations in different life conditions, to be uplifted to what at least seems to be the Ring-0 "Real" Universe.

      The religion you encounter when you get there could be interesting.

      --
      Wyrd, dude.
    38. Re:It's not Optimism, by Snausagez · · Score: 2

      More than just insecure. He's created beings with limited capability intelligence (us) that have a tendency to disbelieve he exists. Keep in mind since he's all-powerful, he's programmed us to doubt him. He's hidden himself and planted all kinds of evidence point towards him not existing. Then in his little game, if you don't believe in him and proclaim your never ending love for him, you get tortured FOREVER. Let me repeat that FOREVER. So you've got this little blip of time to not f@#$ up, and if you do, dragons eating your eyes forever (or whatever ridiculous b@#$shit happens in hell. That's got sadist written all over it. If a man kept you in a hole and tortured you everyday that you didn't get on your knees and say how much you loved him..what would you call that person? We're supposed to be his children that he loves, right? God has basically set up our existence as this precarious, horrific game. Can you imagine putting your 5 year old daughter on a wooden plank over a swimming pool of sharks and saying "well, if she loves her daddy, and listens to me she'll get out of this ok, if not it's her own fault." Is that a loving parent?

    39. Re:It's not Optimism, by ceoyoyo · · Score: 1

      Science isn't on your side. There are a LOT of rocky planets around, lots in habitable zones, and almost certainly lots with liquid water. Intelligence is one of the last areas where we don't have much data. We don't know how long intelligent life is likely to persist, or in what form.

    40. Re:It's not Optimism, by RoccamOccam · · Score: 1

      Of course it's possible. Look at any of the several documentaries that include video of Tatooine for proof.

    41. Re:It's not Optimism, by aristotle-dude · · Score: 1

      It's statistical probability, you Philistine!

      There are lies, damn lies and statistics. Statistical probability is another way of saying "educated guess" or "pulling numbers out of your ass".

      All of the so called "earth-like" planets have turned out to be either gas giants or planets that are tidally locked meaning that they could not support life.

      The number of planets with life currently equals 1 which means all of the statistically probabilities are essentially based on guesses pulled out of an educated ass.

      --
      Jesus was a compassionate social conservative who called individuals to sin no more.
    42. Re:It's not Optimism, by aristotle-dude · · Score: 2

      If you are a parent and sheltered your children from all danger, wouldn't you be considered a bad parent? Do you even understand the concept of free will?

      --
      Jesus was a compassionate social conservative who called individuals to sin no more.
    43. Re:It's not Optimism, by uvajed_ekil · · Score: 1

      If God is omnipotent, why does he need the glory? And why does he seems to need everyone to love him? If this dude is real, he has one serious inferiority complex.

      Well, if he has access to Everything, what else do you give him? Glory is a natural gift for he who needs nothing. In most historical cases of anyone asking for praise to be given to God, it was men asking for the glory to bestowed upon The Lord as a means of showing thanks, not He himself asking. We can praise him, though we can not really give him money, hugs, sausages, a beer, a sweater, or a fancily-wrapped trinket, so props seem like a no-brainer.

      --
      This is a hacked account, for which the owner can not be held responsible.
    44. Re:It's not Optimism, by complete+loony · · Score: 1

      * Of course being omnipotent means there is no curiosity, as God already knows everything... Thus why bother with the first world (assuming that's us) in the first place?

      That could be a good reason to build a universe based on probabilities rather than certainties, eg quantum mechanics. That way, even though you may already know the outcome, you can claim that you didn't cause it and didn't interfere where you weren't welcomed.

      --
      09F91102 no, 455FE104 nope, F190A1E8 uh-uh, 7A5F8A09 that's not it, C87294CE no. Ah! 452F6E403CDF10714E41DFAA257D313F.
    45. Re:It's not Optimism, by Jappus · · Score: 2

      Not only do you have a god given free will but you are allowed to have questions even if you were a person of faith. How many religions allow people to have doubts? How many religions allow people to question what is taught? A faith is not worth anything if it cannot stand up to questions.

      So, given the history of every single religion, you basically state outright that no faith is worth anything.

      There is not a single semi-organized religion or faith, that did not at one point or another declare people with doubts (or simply people who were in the way, politically, militarily or socially) as heretics of one form or another. The Catholics had the Jews, Albigensian, Protestants, Orthodox, Muslims, African/American natives etc. pp. Those each in turn had others they at some point persecuted with the rhetorical help from the followers of their faith. Even the Shintoists and Buddhists kept up a nice war against each other regularly in the history of the Asian continent. Even the religions of pre-colonial South-America used faith as a leverage to incite their own people against others or themselves.

      And if you say: But these were only the people, not the faith itself. Well, that's begging the question as the faith itself does nothing at all. A faith followed by no people is just as active as a faith followed by half the world. It's not the faith that does things, it's the people adhering to the faith. And if they misbehave, then yes, the faith itself is probably being misused, but that is entirely inconsequential to those affected by the cruelty of its followers.

      A faith is nothing more than an abstract idea, powerless and meaningless without followers. Just like the idea of the atomic bomb is powerless without building the bomb itself. Just like the bomb acquires meaning through its use (or not-use), the consequences and meaning of a faith is entirely and completely dominated by the people following it. So if the people are bad, then yes, the faith is bad; not by itself but by its results.

      Given this and your own statement, yes, indeed all faiths are literally worth nothing. Just like any other idea. As you correctly pointed out: People are not automatons. So accept that some people do indeed realize this fundamental truth about the concept of ideas and the consequence that you need to judge people by their actions, not their faith or ideas -- and that you should be extremely wary of judging unduly.

    46. Re:It's not Optimism, by Mindcontrolled · · Score: 1

      Putting forth "free will" as a theodicy must be the worst case of victim blaming in all recorded history.

      --
      Ubi solitudinem faciunt, pacem appellant.
    47. Re:It's not Optimism, by tehcyder · · Score: 1

      Theological debates have the same relation to reality that chess problems have to military tactics.

      --
      To have a right to do a thing is not at all the same as to be right in doing it
    48. Re:It's not Optimism, by Maximum+Prophet · · Score: 1

      If you are a parent and sheltered your children from all danger, wouldn't you be considered a bad parent? Do you even understand the concept of free will?

      That's fine, if the only evil is human-on-human, which much is, but there is also much nature-vs-human evil. Just run naked through the Serengeti with a couple of raw pork chops hung around your neck if you don't believe in natural evil. Tigers, Tornadoes and Tarantulas will cause you as much if not more pain than your fellow man.

      --
      All ideas^H^H^H^H^Hprocesses in this post are Patent Pending. (as well as the process of patenting all postings)
    49. Re:It's not Optimism, by h4rr4r · · Score: 1

      Then why play this sick game?
      Why care if I believe in him so long as I do good?

      A truly loving parent would be glad to see their child do well even if that child does not call them.

    50. Re:It's not Optimism, by h4rr4r · · Score: 1

      From all danger yes, but I sure would let not my little one commit genocide. I would not even let him torture cats for fun.

      A parent that fails to even show up during the child's life to teach those lessons is the kind of parent whose children end up in foster care.

    51. Re:It's not Optimism, by Adammil2000 · · Score: 1

      Bayesian analysis of my attempts to find my car keys would suggest that my keys don't actually exist, right up to the point when I find them...

    52. Re:It's not Optimism, by Raenex · · Score: 1

      And it doesn't matter if the number could be arbitrarily large, as you contend, because the probability could still be small enough that there is only one planet with life, since you don't know what it is.

      If the universe is actually infinite, which is what current cosmology suggests, and the probability of life arising is a purely random event, then by probability life has arisen an infinite number of times, and there's even somebody typing this very same comment out an infinite number of times.

    53. Re:It's not Optimism, by Raenex · · Score: 1

      You do realize that it is possible to be cynical without being an asshole right?

      This coming from the guy who in his very next post says, "WRONG - Strike 3! You are out of there!" Very mature and civil of you.

    54. Re:It's not Optimism, by Grishnakh · · Score: 1

      That's not evil. Evil is when you intentionally cause harm for no good reason. Tigers eating you isn't evil, it's because they're hungry and they have to eat meat to survive, and they see you as food just like an antelope (or whatever their normal prey is). Tornadoes aren't evil because they're not sentient; that's like calling falling rocks evil. Tarantulas are actually pretty difficult to get to bite you (which is why many people have them as pets), but if they do, it's because they're afraid and are defending themselves.

      Charles Manson and his followers, on the other hand, are evil.

    55. Re:It's not Optimism, by Raenex · · Score: 1

      I hope that one day you can experience the love and connection that I feel.

      You realize that feeling isn't special, right? People of different religions or even just people that like to meditate all lay claim to that feeling. It's like Santa Claus for adults.

    56. Re:It's not Optimism, by Raenex · · Score: 1

      I'm quite convinced that a lot of people have pet theories about god(s), and they are worth what I pay for them.

    57. Re:It's not Optimism, by Dahamma · · Score: 1

      A loving parent is not going to coddle their child which is why we are not given all of the answers and why we are not always protected from all dangers.

      Please find one decent parent who, having the capability to prevent their children's death, would not do so in a heartbeat. Anything less is practically negligent child abuse.

    58. Re:It's not Optimism, by noh8rz3 · · Score: 1

      wow that's crass.

    59. Re:It's not Optimism, by mosb1000 · · Score: 1

      That's like saying an infinitely large container is guaranteed to contain a corvette. It's certainly big enough to contain one, but if only has air in it, there will be no corvette. Likewise, infinite space, and infinite mass, and infinite energy does not actually mean infinite possibilities.

      Or to put it another way: if you have an infinite series of random, real numbers between 0 and 100 there is no chance that you will ever encounter a number larger than 100.

      But what's more mind boggling than that, there's no way to guarantee that series contains any particular number. That's because a real number could be anything including pi, e or any number we can conceive of. If life arises out of an incredibly specific set of events, the same way pi is a very specific ratio, even in an infinite universe it could arise only once, or only a few times, or maybe not at all. There's just no way to know.

    60. Re:It's not Optimism, by Raenex · · Score: 1

      That's like saying an infinitely large container is guaranteed to contain a corvette. It's certainly big enough to contain one, but if only has air in it, there will be no corvette. Likewise, infinite space, and infinite mass, and infinite energy does not actually mean infinite possibilities.

      1) Life has already arisen, so it's possible.

      2) The argument is based on the cosmological principle. If the Universe is infinite and everywhere has the general properties that gave life to us, and our creation is based on random variation, then it is possible everywhere and will occur an infinite number of times.

      Of course, the cosmological principle could be wrong, and/or space may not be infinite. There are lots of uncertainties, some that may never be resolved, so this is mostly just an academic discussion.

      But what's more mind boggling than that, there's no way to guarantee that series contains any particular number. That's because a real number could be anything including pi, e or any number we can conceive of. If life arises out of an incredibly specific set of events, the same way pi is a very specific ratio, even in an infinite universe it could arise only once, or only a few times, or maybe not at all. There's just no way to know.

      Sorry, this doesn't make any sense. We're not talking about real numbers, we're talking about events that happen on a crude scale. Any event that happened once is possible and can happen again, and will happen again given an infinite amount of chances.

      If you want to talk about real numbers, then the probability of getting any particular real number when randomly picking from a continuous distribution is zero. That's why you specify intervals for continuous distributions.

  4. broken link by Mini-Geek · · Score: 1

    "Sorry!

    You are not authorized to access this page..."

    --
    do {print "Mini-Geek Rules!\n";}
    until ($TheEndOfTheWorld);
    1. Re:broken link by tombeard · · Score: 1

      Worked fine for me.

      --
      The reason we subjugate ourselves to law is to better procure justice. If law does not accomplish this purpose then it m
  5. They found intelligent life on Earth? by Anonymous Coward · · Score: 4, Insightful

    In all seriousness, we haven't even got a foot on the next planet over. I think we can afford to not bicker and argue over the prospects for life elsewhere for a bit. Give science a chance to discover what it will.

    1. Re:They found intelligent life on Earth? by Anonymous Coward · · Score: 1

      Anyone else have trouble reading that comment without hearing, "Let us not bicker and argue over who killed who"?

    2. Re:They found intelligent life on Earth? by TFAFalcon · · Score: 1

      I thought it was by testing and observing. No amount of discussion will give us an answer about life on other planets. Going there will.

  6. Some article links... by daveschroeder · · Score: 5, Informative

    ...since the one in the story appears dead.

    Expectation of extraterrestrial life built more on optimism than evidence
    http://www.rdmag.com/News/2012/04/General-Science-Expectation-Of-Extraterrestrial-Life-Built-More-On-Optimism-Than-Evidence/

    Is the search for ET pie-in-the-sky fantasy?
    http://www.futurity.org/science-technology/is-the-search-for-et-pie-in-the-sky-fantasy/

    We Really Hope ET is Out There, But There’s Not Enough Scientific Evidence, Researchers Say
    http://www.universetoday.com/94838/we-really-hope-et-is-out-there-but-theres-not-enough-scientific-evidence-researchers-say/

    1. Re:Some article links... by daveschroeder · · Score: 5, Funny

      I see you are either currently unemployed or otherwise uninterested in your life. Please go back to the hole you crawled into for the last few years.

      No one likes you or your bullshit. Go. The. Fuck. Away. Douchebag.

      The depth of intelligent discourse, the subtle give-and-take of reasoned debate — these are the reasons I love slashdot!

    2. Re:Some article links... by CanHasDIY · · Score: 1

      Sayeth the AC who apparently has nothing better to do than troll /.

      Pot, may I introduce you to kettle.

      --
      An enigma, wrapped in a riddle, shrouded in bacon and cheese
    3. Re:Some article links... by Anonymous Coward · · Score: 2, Insightful

      I find it pretty stupid, to be honest.

      By all counts, maths, physics, biology, chemistry, there is life anywhere else outside of Earth, period. Unless we really are in a magical fantasy world made by some bored deity playing Sims Universe.

      Life develops easily with the right requirements, we know this from quite a lot of evidence. We even recreated genesis by accident, twice, and once on purpose just recently.
      We see evolution right in front of us every day, and can even tweak it. We have been doing so for the past few thousand years with farming of crops and animals for the best traits, now we are doing it directly with DNA sculpting.
      We know all the chemical and a considerable number of the biological interactions for life that make even the most basic life exist, and how easy it is for them to flourish given a food source.
      We know that RNA and DNA are very easy and very stable structures to produce. (how the step from random chemicals to RNA world happened is still out there for now)
      We are finding considerably more planets as the months go by, and even rocky ones now.
      The solar system is huge, the galaxy is even bigger, the local cluster is MASSIVE, the universe as a whole is unfathomably big.
      The maths and evidence quite clearly point to a very high percentage of there being life elsewhere.
      In fact, it'd be better to state it as it is impossible for there NOT to be life out there. The numbers are just

      It isn't just a hunch, it is basic math and rules that govern the whole of existence.
      The only faith we have is faith that these laws exist far out there as well and that we aren't in a deities computer composed of bits.
      We can only go with what we know, so it is almost certainly 99.9[repeating to a googol]% likely there is life out there. Complex, probably not as much, but almost certainly life regardless of complexity.
      But one then wonders if non-complex life is even worthy of being called life and not just basic molecular interactions.
      Would you call a Prion life? A virus? Some say yes, some say no. Either way, these are absolutely certain events outside of our little stars neighborhood.

    4. Re:Some article links... by Burning1 · · Score: 2

      Finding/communicating with extratarestrial life is an entirely different set of probabilities than the existance of extratarestrial life.

    5. Re:Some article links... by Jhon · · Score: 4, Interesting

      "Life develops easily with the right requirements, we know this from quite a lot of evidence. We even recreated genesis by accident, twice, and once on purpose just recently."

      Really? Can you provide a link? I've not heard this. I've heard that we've created environments SIMILAR to early earth -- and basic proteins developed... the BUILDING BLOCKS of life. But I haven't heard anything about creating life.

      Unless you are talking about XNA research...

    6. Re:Some article links... by sycodon · · Score: 1, Insightful

      Doesn't it seem that to believe the Earth is the ONLY place in the universe where sentient life has evolved shows extreme conceit?

      But then these people are from Princeton University so they'd know a thing or two about conceit.

      --
      When Fascism comes to America, it will call itself Anti-Fascism, and tell you to give up your guns.
    7. Re:Some article links... by Petron · · Score: 1

      By all counts, math, physics, biology, chemistry, there can't be life anywhere.

      Life develops not so easily... The requirements are pretty strict. Lets go over them.
      The Star: We need to have a star that is very stable, no binary stars, no pulsars, No dwarfs, no giants, just a star that gives out a very steady amount of energy. The wrong star could me by the time we are in a stable orbit, we are too cold, or too hot, or flooded with nasty radiation that could stop life all together. A "common yellow" does the trick, but one as stable as ours isn't as common as the implies

      Next we need to work on the layout of the solar system. We need a planet in the right spot, in the Eden/Goldilocks zone. After that we need a moon around that planet to help with tectonic shift, and tidal affects (to encourage life). The moon has to be the right size to aid life, not to cause massive land/sea waves. Then we need a secondary gravity well, say.... Jupiter. This helps pull all the rogue asteroids into a nice belt away from our planet (we don't want the planet pelted non stop!)

      Next we need to look at the make-up our of our planet. We need lots of carbon (or silicon), oxygen, liquid water, nitrogen (and I'm cutting the list short here) in abundance on the planet. we need the right amounts and we need land (even for sea life), sea and an atmosphere. We need a planet with an Iron core (or other magnetic substance) to create a magnetic shield to protect us from the sun. We need a the right rotation on the planet, If our days were as long as Venus' we'd be dead... Too fast doesn't work too.

      Just getting the environment set up. We have eliminated vast majority of the planets out there.

      Then we get into the improbability of life forming... That by itself is a mystery we have no clue on how it happened. "lightning stuck the mud" doesn't cut it in my book, and about as creditable as an alien playing SimEarth made life. It's a huge "Then the magic happens" moment...

      Now before somebody says "Well the Universe is infinite"... No it is not. Somewhere out there is the Big Bang Event Horizon, outside of which nothing exists. the father out we go from the universe center (where the "bang" happened) the less complex elements we find, to the point where we don't find anything more complex than hydrogen.

      So... Life cannot happen. If you run into something that looks like a life form, just know you are likely imagining it.

      Book to read: Rare Earth: Why Complex Life Is Uncommon in the Universe.

      --
      if (it != oneThing) it = another;
    8. Re:Some article links... by tftp · · Score: 1

      The requirements for human life as we know it are pretty strict.

      FTFY.

    9. Re:Some article links... by HiThere · · Score: 1

      I'd say more lack of imagination than conceit (though I could be wrong). See Clarke's first law.

      --

      I think we've pushed this "anyone can grow up to be president" thing too far.
    10. Re:Some article links... by s.petry · · Score: 2, Informative

      I heard the story before, and believe it to be pure BS. Some guy claims to have made his own primordial soup by sloshing around chemicals. There was no Science I could find to back his claim. It was some anti-creationist on Youtube, but I can't remember the name.

      --

      -The wise argue that there are few absolutes, the fool argues that there are no probabilities.

    11. Re:Some article links... by cffrost · · Score: 1

      Unless we really are in a magical fantasy world made by some bored deity playing Sims Universe.

      It'd be hilarious if this were the case... More so when the DRM wipes us out. ;o)

      --
      Thank you, Edward Snowden.

      "Arguments from authority are worthless." —Carl Sagan
    12. Re:Some article links... by physicsphairy · · Score: 1

      There is only one sure statistic on the probability of life, and that is (# of planets with life) / (# of planets without life),* our estimate of which comes from our own observations.

      If all your theories about biology and astrophysics seem to propose a drastically different number, even as the detection sensitivity and sample size increases, then one thing becomes clear: something is fundamentally wrong with your theories about biology and astrophysics. Because in science, experiment always trumps theory. Experiment is what's real, theory is the best application of your limited understanding.

      You are welcome to your hypothesis that their may be a lot more life than we've detected. But to say stuff like, "It isn't just a hunch, it is basic math and rules that govern the whole of existence" is ridiculous. The idea that the universe is teeming with life is, at present, a diminishing possibility, and to assert something else as the "irrefutable truth of the matter" amounts to religious dogma.
      You assure us that "math" guarantees these things without actually presenting any computation. I don't know that "math" guarantees things in a hopeful/wishful sense.

      Contrary to your claims, we have never replicated genesis. That's still a rather long way off, and even when we manage it, having done it in the laboratory is not itself a comment on the probability of it occurring in a natural environment. I mean, even effecting the synthesis of "life" as it has been typically defined is not a success without long term viability -- cells that exist and replicate for a dozen years before being complete wiped out would not really satisify the idea of life inhabiting other parts of the universe. (and, in as much it actually occurred elsewhere, would be undetectable)

      Like I said, you are welcome to your hypothesis. Just please keep in mind that at present the evidence weights against it, not for it, at least according to our present science.

      *You can of course feel free to extend this to include nebulae, asteroids, etc.

  7. The lack of evidence by Anonymous Coward · · Score: 1

    is not absence of evidence

    1. Re:The lack of evidence by CanHasDIY · · Score: 4, Informative
      --
      An enigma, wrapped in a riddle, shrouded in bacon and cheese
  8. Life is like a Cockroach by Anonymous Coward · · Score: 2, Insightful

    Life is Like a cockroach, where there's one, there's a billion. The whimsical part is the notion that we will ever interact with one another. The distances and natural laws just won't allow it.

    1. Re:Life is like a Cockroach by HiThere · · Score: 1

      We don't know that communication is impossible. But the latency would surely be severe...unless we're really wrong about how things work.

      --

      I think we've pushed this "anyone can grow up to be president" thing too far.
  9. Define Life? by svendsen · · Score: 1

    This assumes all life must look like us. Why can't their be "life" on planets that would cook us alive? Pretty narrow view if you ask me.

    1. Re:Define Life? by Americano · · Score: 5, Funny

      Because if life doesn't look like us, there's no point in finding it. Seriously, do you want to have a hot makeout session with a 5-limbed cross between a cockroach and a slime mold from Rigel 7 No, of COURSE you don't.

      You'd much rather do a little heavy petting with a light-green hottie with blonde hair and 4 boobs from Proxima Centauri. If Star Trek (and the Secret Service) have taught us anything, it's that getting it on with hot chicks in other places is pretty much the only reason to explore.

    2. Re:Define Life? by itsdapead · · Score: 1

      Why can't their be "life" on planets that would cook us alive?

      Because meat tastes much better when it has been properly aged before cooking. Anyway, humans are full of saturated fats and artificial additives.

      But seriously folks - its easy to speculate about forms of "life" beyond our imagination, but if you're talking about trying to find life on exoplanets simply by estimating their surface conditions or maybe, if you are lucky, a bit of spectroscopic data about the atmosphere then the only signs you could look for are the ones you know to be associated with "life as we know it" - temperatures around the triple point of water, surplus oxygen it the atmosphere etc.

      Even radio signals rely on assumptions: we might be able to spot analogue signals from other planets, but we're only (ballpark) 100 years into radio and already we're switching to highly compressed digital formats that would be hard to distinguish from random noise. If that is "typical" then what are the chances than our nearest neighbors are at that very short window in their technological development? We'd be relying on them being monumentally stupid enough to deliberately broadcast easily-decoded signals saying "Here we are! We taste great flash-fried with qur'klozle sauce and fresg g'flona!".

      --
      In a survey of 100 programmers, 111111 thought that duck-typing was a good idea.
    3. Re:Define Life? by MightyMartian · · Score: 1

      If there's life on a planet like Venus, I think that would be pretty amazing and a whole lot of people would be interested in it.

      --
      The world's burning. Moped Jesus spotted on I50. Details at 11.
    4. Re:Define Life? by Burning1 · · Score: 4, Interesting

      The physical differences between Asian, Aferican and European decendents exist because of the time it took for our species to propogate around the world, isolation, enviornmental factors, boarders, politics, and the slow speed of travel at the time.

      In the forseable future, humanity may spread to other planets via generation ships with pressures not unlike those faced by our genetic ancestors. The limited communication between colonies, limited travel opportunities, and enviornmental pressures between habited planets will probably mean that humans on distant stars will begin to take on traits that are very different than those of us who live on earth.

      It's entirely plausable, and even likely, that as humanity spreads around the stars, we will evolve into something not unlike the aliens of star trek. In the future, there just might be a green woman out there waiting for you - someone Alian, but also someone human.

    5. Re:Define Life? by yoctology · · Score: 1

      You don't know an extraterrestrial culture until you have sex with them.

    6. Re:Define Life? by moderatorrater · · Score: 3, Funny

      do you want to have a hot makeout session with a 5-limbed cross between a cockroach and a slime mold from Rigel 7

      Oh, like your taste in women is so great.

    7. Re:Define Life? by moderatorrater · · Score: 1

      That's an almost beautiful idea. Thank you for sharing it.

    8. Re:Define Life? by elgeeko.com · · Score: 1

      Seriously, do you want to have a hot makeout session with a 5-limbed cross between a cockroach and a slime mold from Rigel 7.

      Sounds like my first year of college. At the time it seemed fun, but you're right Rigelians are so over possessive.

    9. Re:Define Life? by 0111+1110 · · Score: 2

      You seem to be assuming that SETI is expecting to find radio leakage from other worlds. That simply is not the case. SETI is based upon the idea of civilizations who might choose to attempt to communicate intentionally either with the entire galaxy using some method quite similar to pulsars or via an automated EM beam that settles on a star system for some period of time before moving on to another. Either way whatever technology they use to communicate with each other on their own planet doesn't factor into any assumptions about their galaxy-wide communication efforts.

      The only way we know of to communicate at light year distances is with electromagnetic radiation, most likely either somewhere in the microwave/millimeter wave spectrum or in the visible spectrum.

      Of course it is also possible that they think of communication via electromagnetic wave modulation to be as primitive as smoke signals or cave drawings might seem to us. It is possible that they make use of some principle of physics that we won't even discover for a few hundred thousand years. If so then they might only use EM communication when communicating with very, very primitive societies. Whether a beacon would use such primitive methods would depend on whether they want to communicate with primitive societies.

      --
      Quite an experience to live in fear, isn't it? That's what it is to be a slave.
    10. Re:Define Life? by KlomDark · · Score: 3, Funny

      There are those who believe that life here began out there, far across the universe, with tribes of humans who may have been the forefathers of the Egyptians, or the Toltecs, or the Mayans. That they may have been the architects of the great pyramids, or the lost civilizations of Lemuria or Atlantis. Some believe that there may yet be brothers of man who even now fight to survive somewhere beyond the heavens.

    11. Re:Define Life? by HiThere · · Score: 1

      FWIW, I expect that there *IS* life on Venus. Quite likely it originated on Earth. It's true I'm talking about microbes that live in the atmosphere, rather than down at the surface, but that doesn't keep it from being life.

      --

      I think we've pushed this "anyone can grow up to be president" thing too far.
    12. Re:Define Life? by tftp · · Score: 1

      Of course it is also possible that they think of communication via electromagnetic wave modulation to be as primitive as smoke signals or cave drawings might seem to us.

      Communication between star systems using EM radiation is just as pointless as sending carrier pigeons across the Atlantic. When (or if) the message arrives it is hopelessly obsolete. We can't tolerate a 10 year ping time to the nearest star.

      The EM communication is useless on this scale. Because of that it does not exist. Perhaps, nothing exists at all if there are other civilizations out there. If there is no FTL travel then these civilizations are hopelessly apart. If there is FTL travel then either a variant of FTL exists for messages, or there are courier drones.

      As things are known to us, the likeliest possibility is that there are many civilizations out there, but there is no FTL. Expansion is only possible with generation ships, and communication between colonies is impossible.

      But even if we assume for the moment that the homeworld sends broadcasts to their colonies using EM (however delayed that might be,) the antennas will be highly directional. Any civilization that can build an asteroid-sized generation ship can build an antenna of the same size or even larger. You'd have to be directly on the path of the beam, plus or minus 0.01 degree, to receive the message. Also, transmissions will be very energy-consuming, so they will be brief. Also, advanced coding methods (like CDMA) transform the signal into a wideband noise. With millions of time slots, millions of spatial slots, millions of frequencies to choose from, and with millions of chipping codes, our chances of intercepting the transmission are extremely low. SETI is looking for a slow, Morse code equivalent of "Hello, everyone!" but most of modern communications on Earth are super-fast gigabit-per-second groups of packets that carry all kinds of data. If I were to send a broadcast to a colony of my planet I would use such a wideband channel because there is a lot of data to be sent.

    13. Re:Define Life? by giorgist · · Score: 1

      Now that's what I would call "HOT" women !!!

    14. Re:Define Life? by itsdapead · · Score: 1

      You seem to be assuming that SETI is expecting to find radio leakage from other worlds.

      Ahem. From my original post: We'd be relying on them being monumentally stupid enough to deliberately broadcast easily-decoded signals saying "Here we are!". Any failure of SETI to detect such signals could mean either (a) the civilizations aren't there or (b) they're not inclined to send out calling-cards. Since we're almost paranoid enough to reject any large-scale attempt to say Hi to our neighbours it would hardly be stretching the principle of mediocrity if (b) was the prevalent view.

      Whether a beacon would use such primitive methods would depend on whether they want to communicate with primitive societies.

      Even our primitive society has come up with the notion that it might be a Bad Idea for an advanced civilization to contact a primitive society.

      --
      In a survey of 100 programmers, 111111 thought that duck-typing was a good idea.
  10. eeeehhhlliott by metrometro · · Score: 1

    Whoever wrote the tagline for this piece should get a beer and day off. Well played.

    1. Re:eeeehhhlliott by Tarlus · · Score: 1

      And a pony. Everybody loves ponies.

      --
      /* No Comment */
  11. Sigh... by MightyMartian · · Score: 1

    This is a case where the statement "absence of evidence is not evidence of absence." Yes, we have no evidence as of yet, but at the same time we have a sample size of exactly one, so trying to making any claim on the frequency or infrequency of life elsewhere in the Universe is utterly ludicrous.

    --
    The world's burning. Moped Jesus spotted on I50. Details at 11.
    1. Re:Sigh... by MightyMartian · · Score: 1

      Sensible Crowd: We're not even sure what to look for, we're not even sure of how abiogenesis occurred, so attempting to answer the question is extremely premature.

      --
      The world's burning. Moped Jesus spotted on I50. Details at 11.
    2. Re:Sigh... by geekoid · · Score: 1

      Statistician: probably yes, but on the other hand...

      heh.

      However it's not premature to ask the question. You must ask the question before you begin to find out.

      Can man \harness electricity needs to be asked before we could have cell phones.

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    3. Re:Sigh... by cffrost · · Score: 1

      Can man \harness electricity needs to be asked before we could have cell phones.

      My cell phone runs purely on clockwork, you insensitive clod!

      --
      Thank you, Edward Snowden.

      "Arguments from authority are worthless." —Carl Sagan
    4. Re:Sigh... by 0111+1110 · · Score: 1

      Just because religionists say a particular thing does not mean it is wrong. It is certainly true that the absence of evidence is not evidence of its absence. Until recently we didn't have any evidence that planets existed outside of our star system. Now we have an abundance of evidence. Before we had this evidence it would have been irrational to make any sort of scientific claim about either the abundance or the rarity of exoplanets. We now have a great deal of evidence that they are common. That doesn't mean that asserting they were common before we had the evidence was either rational or scientific.

      In a similar way people who claim that life in the galaxy or in the universe is either common or extremely rare are both being irrational. There is no evidence either way. The scientifically correct path is not to make any claims at all about the subject. A subject we know absolutely nothing about. In a discussion like this the debate is not between pro-alien and anti-alien, but between those who respect the scientific method and those who don't.

      --
      Quite an experience to live in fear, isn't it? That's what it is to be a slave.
  12. Too many stars by rastoboy29 · · Score: 1

    Personally, I just think about how many stars there are--especially in light of how many planets we are finding--and I can't help thinking life is common.

    That being said, there still might not be any "near" us.

    1. Re:Too many stars by bill_mcgonigle · · Score: 1

      Personally, I just think about how many stars there are--especially in light of how many planets we are finding--and I can't help thinking life is common.

      They say there are more planets in the Universe than there are grains of sands on all the beaches on Earth.

      Oh, but it's most likely that we're unique among them all? All the geo/helio/etc.-centrisms are just human hubris projected upon the known world.

      --
      My God, it's Full of Source!
      OUTSIDE_IP=$(dig +short my.ip @outsideip.net)
    2. Re:Too many stars by geekoid · · Score: 1

      Common is a poor choice of words. You could have a million thrives space faring species in the universe, and it would still be rare.

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    3. Re:Too many stars by HiThere · · Score: 2

      It is, indeed, quite likely that we are unique. This isn't an argument that life doesn't exist elsewhere, just that it will be different. And we can't readily put bounds around how different. (Though I believe that carbon based life will be overwhelmingly dominant. But I'm less certain about liquid water. We really need to take a better look at Titan before I commit myself. It seems quite plausible that low gravity worlds with ammonia or methane based chemistries would be more common than earthlike worlds.)

      --

      I think we've pushed this "anyone can grow up to be president" thing too far.
    4. Re:Too many stars by bill_mcgonigle · · Score: 1

      It is, indeed, quite likely that we are unique. This isn't an argument that life doesn't exist elsewhere, just that it will be different.

      I doubt there's anybody who will argue that there exists another Earth out there. Probably other ribo-nucleic-acid lifeforms, and not unlikely convergent evolution where similar conditions exist, but the argument that the hubristic people make is that Earth is the only planet with complex/intelligent life (because to think they're one of billions in a universe with billions of billions is too much to handle).

      --
      My God, it's Full of Source!
      OUTSIDE_IP=$(dig +short my.ip @outsideip.net)
    5. Re:Too many stars by cffrost · · Score: 1

      [T]he argument that the hubristic people make is that Earth is the only planet with complex/intelligent life (because to think they're one of billions in a universe with billions of billions is too much to handle).

      I think this may likely be (partially) due to the weakness* of the human mind in its ability to handle/visualize large numbers. I have found the pages in the following Wikipedia category somewhat helpful in this regard: https://secure.wikimedia.org/wikipedia/en/wiki/Category:Orders_of_magnitude

      * Relative to machines; not other known minds.

      --
      Thank you, Edward Snowden.

      "Arguments from authority are worthless." —Carl Sagan
    6. Re:Too many stars by rastoboy29 · · Score: 1

      Well said.

  13. Where is my flying car? by PeanutButterBreath · · Score: 4, Insightful

    I think we are at a point where most adults have grown up their entire lives with the assumption that certain great discoveries and advancements will be made in their lifetime. Moon bases. Mars missions. Evidence (at least) of extra-terrestrial life. As these folks (I am one of them) hit the downward slope of their life expectancy (which itself hasn't seen the expected advancements), I expect much more wild speculation, straw-grasping and fallacious conclusions about what "must" exist.

    If the universe is so immense that it is unlikely that extra-terrestrial life doesn't exist, then it is immense enough that we will probably never find it. Then there is the whole issue of whether that life evolved and died a billion years in the past.

    Meanwhile, there are plenty of real problems to be solved and discoveries to be made here on Earth, if anyone is still interested.

    Not saying don't look. Just saying be realistic.

    1. Re:Where is my flying car? by Keith111 · · Score: 1

      Considering that a large amount of our really cool consumer tech has been ported to us from space technology research I'm not sure I follow your logic.

    2. Re:Where is my flying car? by fermion · · Score: 1
      Which is the point. At this point in our technology, flying cars and moon bases are possible, but will they solve any real problems or generate a profit. Certainly we imagined flying cars much more than music players that could would not skip in a car and hold a million songs and play them with no degradation over time. But what do we have?

      WRT to extraterrestrial life, if the question is existence, I am sure at some point in the future we will see some evidence of it. However given the size of the universe and the time the universe exists, will we every meet such a creature? Maybe not. Is the search worthwhile? Sure. Exploration, even when we did not know if we would find anything at all has always been profitable. It is like the basic survival instinct of humans.

      --
      "She's a scientist and a lesbian. She's not going to let it slide." Orphan Black
    3. Re:Where is my flying car? by Cl1mh4224rd · · Score: 2

      Meanwhile, there are plenty of real problems to be solved and discoveries to be made here on Earth, if anyone is still interested.

      I'm pretty sure the human race can multitask...

      --
      People will pass up steak once a week, for crap every day.
    4. Re:Where is my flying car? by 0111+1110 · · Score: 1

      I think we are at a point where most adults have grown up their entire lives with the assumption that certain great discoveries and advancements will be made in their lifetime. Moon bases. Mars missions. Evidence (at least) of extra-terrestrial life.

      I never made any of those assumptions. Especially not about evidence for extraterrestrial life. It saddens me that so many people are so wildly, unrealistically optimistic about things which almost certainly will never happen while they are alive.

      --
      Quite an experience to live in fear, isn't it? That's what it is to be a slave.
  14. no shit, sherlock by sribe · · Score: 1

    We really don't know what the odds are for life evolving, nor the factors that make it more or less likely except on the grossest scale. But as another post, not yet modded up still at 0 points out, the current lack of evidence for life is not evidence of lack of life.

  15. Who the fuck cares? by Anonymous Coward · · Score: 1

    We do research so we might find evidence that might support either side of the argument. Who the fuck cares if we don't currently have evidence to support realistic ET expectations.

    I'm sorry but it seems like this article is nothing more than a "Don't get your hopes up". Which is useful because...?

  16. So in summary... by pitchpipe · · Score: 5, Funny

    Princeton University researchers are [speculating] on the [speculation] that astrobiologists and other scientists [speculate] to one day find life on other planets. Recent discoveries [...] have sparked [speculation] about the possibility of also finding Earth-like life on those worlds, but the [speculation] that life - from bacteria to sentient beings - has or will develop on other planets as on Earth might be based more on [speculation].

    --
    Look where all this talking got us, baby.
  17. observable data set - 1 planet with life by RichMan · · Score: 4, Insightful

    The science is severly limited by the fact our observable data set of worlds with life consists of a single sample.

    It is vary hard to do science with a single sample.

  18. wait until august by Eponymous+Hero · · Score: 1

    the guy who thinks voyager soil samples show signs of bacterial life will know whether he's right or wrong by then.

    --
    insensitive clod overlords obligatory xkcd car analogy russian reversals whoosh pedant fanbois ftfy in 3...2...1..PROFIT
  19. The same old tirade about wishful thinking by tchernik · · Score: 2, Insightful

    Nothing new here. Just the same old complaint of cognitive bias due to our desire to find someone else. Which does not change the fact that life, and even intelligent life are verifiable possibilities in the universe: we do exist, so the process can be repeated somewhere else. Unless you give up on the mediocrity principle and accept that Earth is special. Which from a scientific point of view increasingly seems not to be the case (with all the other confirmed extrasolar planets, some in the Goldilocks zone, for example).

    1. Re:The same old tirade about wishful thinking by mark-t · · Score: 1

      Which does not change the fact that life, and even intelligent life are verifiable possibilities in the universe: we do exist, so the process can be repeated somewhere else

      I've boldfaced part of your remark above, because I felt it important to give it full context, but it is only that part I wanted to address.

      I would suggest that this is actually a fallacious conclusion. All that we really know for certain is that the conditions in the universe *were* at least at one point in time, actually possible, resulting in our own existence. Although I'll concede that it's probably a pretty safe bet that if it happened once it ought to be possible to happen again, this extrapolation is by no means absolutely certain.

      There is nothing about an infinite expanse of time and space that makes singular and unique events impossible... only, at best, unlikely.

    2. Re:The same old tirade about wishful thinking by symbolset · · Score: 1

      There is also the assumption that abiogenesis occurred on Earth, which is not proven.

      --
      Help stamp out iliturcy.
  20. A Counter-Comment Link by Anonymous Coward · · Score: 1

    Expectation of extraterrestrial life built more on optimism than evidence http://www.rdmag.com/News/2012/04/General-Science-Expectation-Of-Extraterrestrial-Life-Built-More-On-Optimism-Than-Evidence/

    And yet there's a Slashdot user named mbone that repeatedly claims otherwise ... either he's an extremely well researched troll or he's on to something.

    1. Re:A Counter-Comment Link by Internetuser1248 · · Score: 2

      And yet there's a Slashdot user named mbone that repeatedly claims otherwise ... either he's an extremely well researched troll or he's on to something.

      Thanks, that link is way more interesting and informative than anything on this thread

  21. In search of... by garyoa1 · · Score: 1

    It would seem that at least microbes or maybe plant life would be inevitable. As far as intelligent life... well, we haven't located any on Earth yet so I have my doubts.

    --
    Wuddooeyeno? IITYWYBMAD? Like nuts? eclecticallyincorrect.com
    1. Re:In search of... by geekoid · · Score: 1

      We have buildings of steel and glass
      we have put men on the moon
      We have a machine on the cusp of leaving the solar system
      we have mapped millions of other planets
      We can travel faster the sound
      We can talk across the globe in an instant

      Don't tell me we aren't intelligent.

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    2. Re:In search of... by Fast+Thick+Pants · · Score: 1

      Sounds like the makings of a good DEVO song!

  22. It's okay to say we don't know by A+beautiful+mind · · Score: 1

    The uncertainties are so large around life that currently noone can call "we will find life for sure" whimsical or optimistic compared to "we won't find life elsewhere for sure". It's just as uncertain.

    --
    It takes a man to suffer ignorance and smile
    Be yourself no matter what they say
  23. Re:observable data set - 1 planet with life by Hentes · · Score: 4, Insightful

    This. We can't even confirm or deny the existence of life on Venus or Mars.

  24. WRONG FIELD by gurps_npc · · Score: 1, Insightful
    This guy is an astrophysicist, not an astrobiologist. Don't trust a chemist to talk about physics, you don't trust a geologist about climate science, and you don't trust a astrophysicist to talk about biology.

    This is once again more moronic bullcrap that says other planets are not like earth, so life can't evolve on them.

    Most of the universe is composed of dark matter. We know nothing about dark matter, so saying you won't find life there is like saying you don't think there is any thing in a closed box before you even shake it.

    Doing so just makes a fool out of the arrogant doctorate that thinks his Phd in one field of science makes him an expert in all.

    The basic fact is the astrophysicists always make the SAME mistake - assuming life has to be earthlike. The definition of life is very broad and does not require DNA, water, or any of the rest of the stuff the astrophysicists look at.

    --
    excitingthingstodo.blogspot.com
    1. Re:WRONG FIELD by alexo · · Score: 4, Interesting

      This guy is an astrophysicist, not an astrobiologist. Don't trust a chemist to talk about physics, you don't trust a geologist about climate science, and you don't trust a astrophysicist to talk about biology.

      He could be a janitor for all I care. The only important question is: is his science sound or not.

    2. Re:WRONG FIELD by Suddenly_Dead · · Score: 1
    3. Re:WRONG FIELD by HiThere · · Score: 1

      Well, actually we know that most dark matter doesn't strongly interact even with other dark matter. This makes dark matter life quite unlikely. Unless, of course, there's lots of different kinds of dark matter, and SOME KINDS of it interacts strongly with others kinds which are a part of the same set of kinds of dark matter. This possibility can't be eliminated with currently available data.

      Actually, thinking about it, perhaps there are several different disjoint sets of kinds of dark matter, each set of which interacts strongly with other members of the same set, and not with other sets...and we could be in one of those sets, as far as members of other sets are concerned. I don't know enough to know whether this is consistent with existing data or not. Though I do know that it's not one of the currently accepted theories.

      --

      I think we've pushed this "anyone can grow up to be president" thing too far.
    4. Re:WRONG FIELD by gurps_npc · · Score: 1
      If he isn't a biologist then he himself does not if his science is sound. He talks a good game about everything that is IRRELEVANT and you personally don't know enough about biology to see his major mistakes (unless you are a biologist).

      You are correct in your claim that the janitor is JUST as good a source. But the media wouldn't be publishing the janitor's ideas and we need to realized the guy is no better than a janitor. He is talking out of his field, no serious person should give him any media exposure - INCLUDING Slashdot.

      Now, if he came up with something interesting and a biologist confirmed it, then that would be worth talking about.

      But now we just got some random guy talking about something he doesn't know anything at all about. Yeah, he might be right - but so might the janitor - and no one with any real education has confirmed his wild, unproven, untested theories that are based on zero actual training.

      --
      excitingthingstodo.blogspot.com
  25. Actually it's based on statistics by msobkow · · Score: 4, Insightful

    The idea of finding life on other planets is actually based on statistics. There are literally billions of Earth-like planets in the universe. The chances are that conditions on at least some of those planets has given rise to life.

    There is also a very good statistical chance that there are non-carbon life-forms on other planets.

    So unless you've got a "God created the Earth" mentality, there being life on other planets is a foregone conclusion.

    Does that mean we'll encounter life from other planets? Perhaps not. That depends on whether any forms of FTL ever prove feasible, beyond which there's the roll of the dice of the rarity of planets with life. The odds are you'd have visit and explore a fair number of dead worlds before you'd encounter one with life.

    Only those who think we are "created in God's image" would stick their heads in the sand and claim otherwise. God has no image, and it's form is the universe itself. To think we look anything like the universe is ludicrous!

    --
    I do not fail; I succeed at finding out what does not work.
    1. Re:Actually it's based on statistics by geekoid · · Score: 1

      " foregone conclusion."
      hmm. probability approaching one.

      --
      The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    2. Re:Actually it's based on statistics by Rostin · · Score: 4, Insightful

      The idea of finding life on other planets is actually based on statistics. There are literally billions of Earth-like planets in the universe. The chances are that conditions on at least some of those planets has given rise to life.

      And what, if I may be so crass as to inquire, do you base that assessment on? The fact that "billions" is a large-seeming number? What if the probability of life (as we know it) forming on an earth-like planet is 1:10^12? The point of the article is that we simply don't know what that probability is, so arguments like the one you are making here are based on fantasy rather than evidence.

      There is also a very good statistical chance that there are non-carbon life-forms on other planets.

      Again: How do you know? Before, you were making a statistical argument from a sample size of one, which is bad. But now, since we know of zero planets that host non-carbon-based life, you are making an argument based on literally nothing but maybe old Star Trek episodes.

    3. Re:Actually it's based on statistics by msobkow · · Score: 1

      I only said "billions" because the vast majority of people would think you're crazy if you claimed "trillions" or more. But in an infinite universe, the latter is probably far more accurate than the former.

      Thinking about infinity is fun. And the universe is infinite in that by the time you'd reach the boundary (even with FTL), the expanding boundary will have moved and you still won't be at the theoretical "edge" of the universe.

      --
      I do not fail; I succeed at finding out what does not work.
    4. Re:Actually it's based on statistics by Derekloffin · · Score: 2

      And what, if I may be so crass as to inquire, do you base that assessment on? The fact that "billions" is a large-seeming number? What if the probability of life (as we know it) forming on an earth-like planet is 1:10^12? The point of the article is that we simply don't know what that probability is, so arguments like the one you are making here are based on fantasy rather than evidence.

      What is more unlikely, that Earth is the special seed in the hundreds of billions of galaxies out there, all composed of a few billions stars each, or that we're just one of many such planets carrying life. Now, as the previous poster said, that doesn't mean we're ever going to encounter said life, but it is a HELL of an assumption that the qualities for production of life are so remote that only Earth managed to fit the criteria, especially when the biological evidence so far speaks to life being surprisingly easy to start out.

    5. Re:Actually it's based on statistics by fiordhraoi · · Score: 2

      I like to think that "in God's image" refers not to the physical. I'm going to borrow a bit from Neitzche here.

      Companions the creator seeks, not corpses, not herds and believers. Fellow creators the creator seeks--those who write new values on new tablets. Companions the creator seeks, and fellow harvesters; for everything about him is ripe for the harvest.

      Don't worry, some of us who believe in some sort of God also believe that we have brains and logic for a reason. And that any human attempt to simplify something as complex as a true divinity is ultimately going to be speaking in paraphrase and vast approximation. Heck, some of us even understand that the Bible is not necessarily literal truth in all instances, but rather a way of teaching religious and moral truths! :)

      In the end though, I agree. There's too many planets and celestial bodies out there, period, for life of some sort not to have developed elsewhere. Will it be discovered in my lifetime? Maybe, maybe not.

    6. Re:Actually it's based on statistics by Burning1 · · Score: 1

      God has no image, and it's form is the universe itself.

      Astrophysicist Neil Degrasse Tyson points out that the 4 most common elements in the universe in order of prevelence are Hydrogen, Oxygen, Helium, and Carbon. The 3 most common elements in our bodies are Hydrogen, Oxygen, and Carbon, in that order. We are very much made in God's own image.

      (Helium is inert, so our body really can't use it for anything other than "making our voices sound funny.")

    7. Re:Actually it's based on statistics by painandgreed · · Score: 1

      The idea of finding life on other planets is actually based on statistics. There are literally billions of Earth-like planets in the universe. The chances are that conditions on at least some of those planets has given rise to life.

      We can probably assume there are billions of Earth-like planets for large values of Earth-like, and we know life rose on at least one of them, ours. However, it is can be argued that our Earth where life did rise is a combination of one in thousand occurances that could make for a very rare combination. There needs to be early metal rich stars to give rise to the supernovae needed to produce lots of heavier elements. There needs to be water. There needs to be a strong magnetic field so the atmosphere and water don't get blown away like Mars. Other arguments that there needs to be a large sattelite like the moon for tidal changes. There are several other issues, that by themselves does not make Earth that uncommon but rather that we have all these happening on this one planet could mean that to be Earth-like enough to give a good probability of life rising and prospering perhaps could be in the neighborhood of one in a galaxy.

    8. Re:Actually it's based on statistics by FrootLoops · · Score: 1

      Does that mean we'll encounter life from other planets? Perhaps not. That depends on whether any forms of FTL ever prove feasible, beyond which there's the roll of the dice of the rarity of planets with life.

      People always seem to forget (or never learned) length contraction. If you're in a spaceship pointed at the center of the galaxy, as you approach the speed of light the length between you and the center of the galaxy contracts. The contraction factor (the Lorenz factor, I'll call it g) is determined by your speed. It's 1 when you're at rest compared to the center of the galaxy and goes to infinity as you approach the speed of light. To give some actual numbers, if you want to travel 30,000 (rest frame) lightyears in 1 year, you'd need a speed of about 0.99999999945c and a Lorenz factor of about g=30021.

      Mass dilates as well, meaning that an object at this speed has more kinetic energy than the classical KE = 1/2 mv^2 formula. The special relativistic formula giving the energy required to bring a mass m at rest to a speed encoded in the Lorenz factor g is mc^2 (g-1). At the above speed, g-1 = 30020, so you would need to convert 30020 times as much mass as your spacecraft has to energy in order to get to the required speed. For comparison, for a 100 metric ton spacecraft this is around 0.7 times as much energy as the sun puts out each second.

      Actually doing this is certainly impossible today and for the near future, but perhaps one day it will be feasible to send small crafts between worlds. It's important to note that, for the people 30,000 light years away, your journey would take approximately 30,000 years. But to you it would take only 1 year. If you made a return trip, Earth would be more than 60,000 years different. The point is that you could make the journey in a single human lifetime, with an efficient enough propulsion system, so long as you were alright with both earth and your destination experiencing a large passage of time.

    9. Re:Actually it's based on statistics by Rostin · · Score: 1

      What is more unlikely, that Earth is the special seed in the hundreds of billions of galaxies out there, all composed of a few billions stars each, or that we're just one of many such planets carrying life.

      I don't know. Neither do you.

      especially when the biological evidence so far speaks to life being surprisingly easy to start out.

      I'm calling your bluff. What biological evidence are you talking about? I'm not a biologist, but in my understanding, origin of life research is still very much in its infancy. We don't know how life started, much less that it started surprisingly easily.

    10. Re:Actually it's based on statistics by arobatino · · Score: 1

      What if the probability of life (as we know it) forming on an earth-like planet is 1:10^12?

      Doesn't the fact that life managed to evolve on Earth shortly after conditions allowed for it (a fairly small fraction of the Earth's lifetime) make it very likely that life will evolve anywhere the same conditions exist?

    11. Re:Actually it's based on statistics by tftp · · Score: 1

      At the above speed, g-1 = 30020, so you would need to convert 30020 times as much mass as your spacecraft has to energy in order to get to the required speed.

      A runner from Marathon would certainly tell you, just before dying, that there is absolutely no way to deliver a message faster than he just did (outside of pigeons, they were in use at that time.)

      As far as I know, nobody even suggests battling the light speed barrier head on. The physics is well proven in accelerators. The only hope for FTL is in bypassing the problem altogether.

    12. Re:Actually it's based on statistics by FrootLoops · · Score: 1

      The bit of my post you quoted has nothing to do with your comments, which in turn have little to do with my post. I'm sorry, but did you even read it? My post is not about FTL communication whatsoever. It's about traveling between distant planets in a single human lifetime using the known relativistic effect of length contraction.

    13. Re:Actually it's based on statistics by qwak23 · · Score: 1

      Because I'm bored and procrastinating - (initial numbers pulled from wikipedia)

      There are 4 x 10^11 stars per galaxy (average)
      There are 8 x 10^10 galaxies in the observable universe
      This gives us 3 x 10^22 star systems in the observable universe.

      I am now going to assume that each star system has planets, and that one third of star systems have an "earth like planet" (planet capable of supporting life as we would recognize it). I have just pulled this number out of my ass as we really have very limited data on exoplanets. It may be a severe overestimation, it may be a severe underestimation.

      Number of "earth like planets" in the observable universe based on my assumptions - 1 x 10^22
      Using the one in a trillion probability above gives us 1x10^10 planets in the observable universe with life. That's a lot of planets in the observable universe, but ends up being less than one per galaxy (8 x 10^10 galaxies).

      Of course we have no way to know what the probabilities actually are, and our data on exoplanets is really limited so it's difficult to extrapolate this out to the entire universe. I'd personally like to think the probability that life springs up is better than one in a trillion, but that's not based on any evidence, only hunches and wishes.
      For all we know life is common in this galaxy (and every galaxy) but the limits of physics make it difficult to find and connect with that life (assuming it even evolved "intelligence" in the first place).

    14. Re:Actually it's based on statistics by WalksOnDirt · · Score: 1

      I think it is far more likely that we'll extend human lifespans than that we will achieve such speeds. Who cares if it takes 1,000 years to get to another star if you're going to live for millions?

      --
      a,e,i,o,u and sometimes w and y (at be if of up cwm by)
    15. Re:Actually it's based on statistics by gl4ss · · Score: 1

      the actual chance might be just one in 1000 billion. the probabilities are just pulled out of optimists ass, that's the point of these articles..

      how come we're here then? well we wouldn't be here to observe if it hadn't happened here..

      --
      world was created 5 seconds before this post as it is.
    16. Re:Actually it's based on statistics by ceoyoyo · · Score: 1

      Actually, we don't know if the universe is infinite or not.

      If it is, there are fun things out tree like an infinite number of earths. Not earth-like planets but literal earths, with exact copies of you and I.

  26. ET? by Lucas123 · · Score: 1

    Sure, why not? Let's see, if an alien civilization discovered how to travel at the speed of light, and they lived in the nearest solar system with earth-like planets, then it's only 44 trillion kilometers or 4.4 light years away. I can see traveling for 4.4 years in a small spacecraft in order to pick up farmers and mechanics on earth and probe them.

    --
    No chance, English bed-wetting types. I burst my pimples at you and call your door-opening request a silly thing, you tiny-brained wipers of other people's bottoms!

    1. Re:ET? by Black+Parrot · · Score: 1

      Sure, why not? Let's see, if an alien civilization discovered how to travel at the speed of light, and they lived in the nearest solar system with earth-like planets, then it's only 44 trillion kilometers or 4.4 light years away. I can see traveling for 4.4 years in a small spacecraft in order to pick up farmers and mechanics on earth and probe them.

      Actually, aliens discovered earth 65 million years ago. But after their big-game safaris killed off the dinosaurs, they haven't felt any reason to come back.

      --
      Sheesh, evil *and* a jerk. -- Jade
  27. Science by g0bshiTe · · Score: 1

    I thought science was about forming a theory or hypothesis and then either proving or disproving it. You can't see gravity but it's there, Isaac Newton didn't discover it, but he started pondering the mechanism. Does not mean that the billions of years prior to that everything floated.

    I think if anything it will make us redefine what is life, not to mention that it's going to be hard to prove or disprove life on other planets without evidence to support or lack or evidence to refute it, just because we don't find life on the first 100,000 planets doesn't mean 100,001 won't be teaming with life. Once earth was at the center of our solar system, we know that to be untrue now, we thought mental illness was caused by demons we know different now. To make the claim that we are the only sentient lifeforms in the entire universe is well beyond conceited.

    --
    I am Bennett Haselton! I am Bennett Haselton!
    1. Re:Science by Black+Parrot · · Score: 1

      Plus, science tries to operate under the assumption that "things work elsewhere pretty much like they work here", unless there is a reason to reject it.

      --
      Sheesh, evil *and* a jerk. -- Jade
  28. Re:Obama ate a dog. by ad1217 · · Score: 2

    How is that different from eating any other animal?

  29. born of soup, evolved, self-destructed... by lkcl · · Score: 1

    the problem that NASA etc. isn't really considering is that some of the planets they're looking at could well have had life borne out of the primordal soup, evolved to sentience, discovered genetic engineering, created plants and food crops that went out-of-control and destroyed the entire ecology and turned the entire planet into a barren wasteland... all hundreds of millions of years before NASA or anyone else took a peek at the barren rock that is left from a distance of billions of miles away.

    so in other words, the article appears to have entirely missed the point that we're looking for *ecologically responsible* intelligent life on other planets that is sufficiently stable that they haven't blown themselves to shit or fucked their planet into oblivion.

    my main worry right now is whether the present occupants of planet earth will be around long enough to be contacted *by* intelligent life on other planets.

  30. Yup, it's crap by gelfling · · Score: 1

    Because even if there's some non zero probability of existing, people of earth will never ever ever ever ever ever ever ever ever find it. Never. Not ever. Mankind will never find any direct evidence of life anywhere else.

  31. Let's take a look at ourselves first ... by applematt84 · · Score: 1

    Has anyone ever thought about the reason why we haven't found nor been contacted by intelligent extra-terrestrial life is due to the fact that our world is so mucked up? I wholeheartedly believe that intelligent life exists elsewhere in the universe; so put yourself in their shoes. If you're an alien with the intelligence and skill to achieve interstellar travel, would you stop and visit a world as hostile as ours, or simply avoid it and classify said planet as "The Ghetto"?

    1. Re:Let's take a look at ourselves first ... by Geoffrey.landis · · Score: 1

      If you're an alien with the intelligence and skill to achieve interstellar travel, would you stop and visit a world as hostile as ours, or simply avoid it and classify said planet as "The Ghetto"?

      Heck yes; I'd have visited it about a hundred million years ago, to see the dinosaurs!

      Who wouldn't want to sightsee to a world with dinosaurs?

      --
      http://www.geoffreylandis.com
    2. Re:Let's take a look at ourselves first ... by Black+Parrot · · Score: 1

      I suspect the Federation has red-zoned us, until such time as we quit eating other intelligent species.

      --
      Sheesh, evil *and* a jerk. -- Jade
    3. Re:Let's take a look at ourselves first ... by PhilHibbs · · Score: 1

      It is my considered opinion that if there is complex life comparable to ours on other planets, it will be astonishingly similar to us - in that it will be dumb, short-sighted, greedy, wasteful, and hazardous to both itself and any other life around it. That's how evolution works - that's [b][i]the[/i][/b] best strategy for dominating your ecosystem and out-competing every other dumb, short-sighted, greedy, wasteful, and hazardous life form that you have to compete with.

      Or - if it is enlightened and wise and far-sighted and unlike all the things I listed earlier, then it will have gone through a phase in its development that was astonishingly similar to ours, and will understand very well the predicament that we are in and why we are the way we are. As to whether it will conclude that it is a good idea to help us, or whether it will revert to type and treat us as a dangerous competitor... well, I have no idea of the answer to that one.

      Or, maybe I've just been watching too much Babylon 5. But I think I mostly held this opinion already before that.

    4. Re:Let's take a look at ourselves first ... by applematt84 · · Score: 1

      Yeah, Prime Directive and all. Sometimes I wonder if Mr. Roddenberry drew from the Human race when creating the Klingon's?

  32. Scientific facts by geekoid · · Score: 1, Interesting

    1) on a planet with water, life can rise up.
    2) There is a lot more water out the in the universe then we every imagined.
    3) There are billions of planet that can have liquid water.

    So the existence that life is in the universe is a fact.

    The idea that it can only happen once is a guess.

    --
    The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
  33. Link to Article by Anonymous Coward · · Score: 2, Informative

    Here is a link to the article on arXiv

    http://arxiv.org/abs/1107.3835

  34. Summary: ETs are laughing at you. by billstewart · · Score: 1

    ... but you can't always believe what they say.
      Dude, we just flew here in that saucer thing!
      Dude, we totally can't walk up stairs!
      It's a [tokes] Cookbook, man!
      Extoiminate! Extoiminate! Nyuk nyuk!

    --

    Bill Stewart
    New Fast-Compression-only CPR http://preview.tinyurl.com/dy575ks
  35. Article & preprint by Eivind+Eklund · · Score: 2

    Their article is at PNAS (with an accessible preprint on Arxiv.org and has the following abstract:

    Abstract

    Life arose on Earth sometime in the first few hundred million years after the young planet had cooled to the point that it could support water-based organisms on its surface. The early emergence of life on Earth has been taken as evidence that the probability of abiogenesis is high, if starting from young Earth-like conditions. We revisit this argument quantitatively in a Bayesian statistical framework. By constructing a simple model of the probability of abiogenesis, we calculate a Bayesian estimate of its posterior probability, given the data that life emerged fairly early in Earth’s history and that, billions of years later, curious creatures noted this fact and considered its implications. We find that, given only this very limited empirical information, the choice of Bayesian prior for the abiogenesis probability parameter has a dominant influence on the computed posterior probability. Although terrestrial life's early emergence provides evidence that life might be abundant in the universe if early-Earth-like conditions are common, the evidence is inconclusive and indeed is consistent with an arbitrarily low intrinsic probability of abiogenesis for plausible uninformative priors. Finding a single case of life arising independently of our lineage (on Earth, elsewhere in the solar system, or on an extrasolar planet) would provide much stronger evidence that abiogenesis is not extremely rare in the universe.

    --
    Doubting the existence of evolution is like doubting the existence of China: It just shows that you're uninformed.
    1. Re:Article & preprint by ceoyoyo · · Score: 1

      They made the startling discovery that a single sample doesn't provide much statistical evidence. Shocking.

      Why do some people think that putting "Bayesian" in an abstract is like putting "on the Internet" in a patent?

  36. Re:observable data set - 1 planet with life by geekoid · · Score: 1

    Science starts with a single example.
    It's hard to come to a conclusion with one sample. Other then life can exist.

    --
    The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
  37. Someone should take the time by J'raxis · · Score: 2

    Recent discoveries of planets similar to Earth in size and proximity to the planets' respective suns have sparked scientific and public excitement about the possibility of also finding Earth-like life on those worlds.

    But Princeton University researchers have found that the expectation that life---from bacteria to sentient beings---has or will develop on other planets as on Earth might be based more on optimism than scientific evidence.

    Wow, this sounds like just what scientists were saying about the likelihood of discovering extrasolar planets themselves... before a bunch were discovered. And then I remember a flurry of stories full of similar nay-saying, but just about the idea of discovering Earth-sized planets. Until they discovered some of those, too.

  38. What they ACTUALLY said by SoftwareArtist · · Score: 3, Insightful

    The title is completely wrong. Nothing about this work suggests extraterrestrial life isn't plausible, nor that there's anything whimsical about it. Here is what they actually said.

    We know that life appeared on earth very soon after the surface became cool enough to be habitable. People therefore assume the same would be true on other planets. But having only one data point doesn't give us enough evidence to actually conclude that with any confidence. In particular:

    1. It took a few billion years after that for life to evolve to the point where it could wonder about the possibility of life on other planets.
    2. If it had taken a few billion years for life to appear in the first place, we might never have reached this point.
    3. Therefore this might just be an anthropic effect. Intelligent life forms will always find themselves on planets where life appeared quickly, but that doesn't tell you how often life actually does appear quickly.

    --
    "I'm too busy to research this and form an educated opinion, but I do have time to tell everyone my uninformed opinion."
    1. Re:What they ACTUALLY said by careysub · · Score: 1

      The title is completely wrong. Nothing about this work suggests extraterrestrial life isn't plausible, nor that there's anything whimsical about it. Here is what they actually said.

      We know that life appeared on earth very soon after the surface became cool enough to be habitable. People therefore assume the same would be true on other planets. But having only one data point doesn't give us enough evidence to actually conclude that with any confidence. In particular:

      1. It took a few billion years after that for life to evolve to the point where it could wonder about the possibility of life on other planets. 2. If it had taken a few billion years for life to appear in the first place, we might never have reached this point. 3. Therefore this might just be an anthropic effect. Intelligent life forms will always find themselves on planets where life appeared quickly, but that doesn't tell you how often life actually does appear quickly.

      Good summary. And it clearly shows the weakness of their argument. It might be an anthropic effect true, but the interesting thing about the evidence of the emergence of life on Earth is that we know it occurred quickly, in fact so quickly that the evidence is consistent with it being instantaneous. That is - we can push the evidence essentially back to the earliest remaining material in which we could hope to find such evidence. We see a trend of earlier material, when found, giving ever earlier evidence shrinking the gap between that life and the last sterilizing bombardment.

      This is direct evidence of a very rapid life emergence rate parameter (lambda in the PNAS article). While the late emergence of intelligence on Earth makes it likely that human-style intelligence is rare (unlikely on average to occur at all) there is little evidence to support their proposed model where a special rapid lambda is being observationally selected for in order for our intelligence to emerge.

      --
      Starships were meant to fly, Hands up and touch the sky - Nicky Minaj
  39. Re:Obama ate a dog. by drpimp · · Score: 1

    I am assuming you intend to further embellish that it was all beef and halal. In other news, Romney will just attach one to his roof.

    --
    -- Brought to you by Carl's JR
  40. Thanks, Captain Obvious! by Rational · · Score: 1

    What we know about the likelihood of life elsewhere in the Universe amounts to precisely fuck-all, since our current sample size is exactly one. That's not exactly rocket surgery. So, while technically correct, this "analysis" has probably more to do with riling the nerds for LOLs than any serious or enlightening purpose.

    --
    "Be nice, veer left, and never stop thinking" Iain Banks - Walking On Glass
    1. Re:Thanks, Captain Obvious! by Black+Parrot · · Score: 1

      So, while technically correct, this "analysis" has probably more to do with riling the nerds for LOLs than any serious or enlightening purpose.

      If that is true, they should have published it on Slashdot.

      --
      Sheesh, evil *and* a jerk. -- Jade
  41. Re:SETI = Waste of Money by camperdave · · Score: 1

    SETI only gets a couple of million dollars. There are far more wasteful things getting a far larger share of the pie than SETI. For example, the US has six times as many aircraft carriers as any other country on the planet, more than the combined navies of every other country combined; yet they are building twice as many as currently exist in the British Royal Navy. At $13+billion a pop, that's quite a lot of money. Cut one of the aircraft carriers and give the money to NASA, or NOAA.

    --
    When our name is on the back of your car, we're behind you all the way!
  42. Sigh... by Nrrqshrr · · Score: 2

    Reminds me of all that bullshit religious bigots serve me at any argument about aliens.. "If you believe in aliens why don't you believe in god?".

    Because am not a fucking egocentric cunt who believes he is the center of the world, the universe, and the rest! This is why.

  43. Can't help being cynical. by wcrowe · · Score: 1

    Mostly, I think the "life" they are looking for is in NASA projects that otherwise would be dead. If you breathlessly announce lots of planets that have the possibility of life, you're more likely to get funding for your project.

    That's not to say that the Kepler project isn't useful, it is profoundly important, but when you spend a lot of money to build and deploy a space telescope, well, a lot of people expect results. Those results better be forthcoming if you want to continue the project and/or build more and better space telescopes.

    All the Princeton researchers are saying is, that the number of life-bearing planets we know about is approximately 1. Therefore, we don't really know much about life-bearing planets, how life forms on them, how fast it develops, etc.

       

    --
    Proverbs 21:19
  44. Re:observable data set - 1 planet with life by Anonymous Coward · · Score: 1

    This is why I get irked every time someone says something like, "It's a statistical certainty that life exists elsewhere in the Universe." People just don't fucking get it.

  45. Pointless (and wrong) exercise in Statistics by DumbSwede · · Score: 3, Insightful

    Thousands of Exo-planets discovered. Viking’s life detection experiments are being reconsidered. Life has been found to have started very early in Earth’s evolution. Various Extremophiles discovered. For the last twenty years the evidence keeps tipping in favor of extraterrestrial life being more and more likely. That we haven’t yet discovered said life says more about our commitment to doing so than its likely-hood.

    Sadly this article will be linked to a thousand times by the ID crowd shouting we need to stop wasting all this money looking for ET and realize how special and God chosen we are.

    I’d also add Bayesian analysis sucks when it comes to these all or nothing analysis with such a small sample size. Bayesian analysis can be used to say we have approximately 50-100 years of civilization left. HOWEVER the same analysis 200 years ago would have given roughly the same result. These kinds of statistics mean nothing until you have a large data set that is properly categorized. We don’t even know for certainty our next nearest planetary neighbor is lifeless. Finding life on Mars would sudden explode Bayesian stats to near certainty that life is everywhere.

    1. Re:Pointless (and wrong) exercise in Statistics by Raenex · · Score: 1

      I'd also add Bayesian analysis sucks when it comes to these all or nothing analysis with such a small sample size.

      Pretty much all statistics suck when you have a such a small sample size. All the paper is doing is making the argument that high estimates for the probability of life are based on assumptions, or beliefs, by the scientists. They use a Bayesian model because that's what they are trying to isolate.

  46. Fewer variables improve probability. by Aphoxema · · Score: 1

    We got where we are thanks to the dead animals time has gifted to us and buried beneath our feet. Going by the inevitable and grim prospect of running out of the good stuff, if our own fate is the likely outcome of sentience blessed with 150 millions years worth of sunlight compressed into goo, then intelligence life is going to be a whole lot harder than even the skeptics want to appreciate.

    I think life is very likely. I think us seeing it won't happen. I certain us meeting other, intelligent life in the universe during the tiny window we'll get to survive as a species is simply impossible.

    We don't deserve intergalactic travel. Maybe, though, we'll be lucky enough to be a part of the next fossil fuels that kickstarts the next dominant species' intellectual revolution. It would almost be the responsible thing to just decimate the human species now before we waste what fossil fuels are already there so that the next contender has a better chance of unraveling the mysteries of the universe.

    --
    "Most people, I think, don't even know what a rootkit is, so why should they care about it?"
  47. Re:observable data set - 1 planet with life by joh · · Score: 1

    The science is severly limited by the fact our observable data set of worlds with life consists of a single sample.

    It is vary hard to do science with a single sample.

    Well, it proves beyond doubt that life is *possible*. It still may be a freak accident that only happened exactly once on all planets in the universe, but it *can* happen. That's more than knowing nothing.

    Personally I think there is lots of life, but complex, even intelligent life, even with with technology and industry may be very rare. It also may tend to be very short-lived and every two species may easily be divided by not only space but also time.

  48. Obligatory Krauss Quote: by newcastlejon · · Score: 2

    "The Universe is big and old and rare things happen all the time, including life."

    --
    If God forks the Universe every time you roll a die, he'd better have a damned good memory.
  49. Nearly a certainty by Sycraft-fu · · Score: 4, Insightful

    Neil DeGrasse Tyson gives a good talk on this, as usual with things related to astrophysics. He points out that the elements we find in our bodies are the same elements you find in the universe, and in the same order (hydrogen is the most common in the universe, and is the most common in us) and that you can trace the atoms in us to the crucible that formed stars. We are, literally, stardust. Well that is almost certainly not a coincidence. We are made of what we are made because the universe is made of what it is made. Same shit with carbon being our building block: Carbon is THE building block, you can make more molecules with it than with all other elements combined.

    So looking at all that, we look pretty damn typical, pretty damn common. Thus when you have galaxies with hundreds of billions of stars, and 100-200 billion (observed) galaxies in the universe it becomes a near statistical certainty that such a thing would happen elsewhere. We aren't some special collection of elements that you are highly unlikely to see, we are precisely what you'd expect based on cosmic observation.

    1. Re:Nearly a certainty by Bill,+Shooter+of+Bul · · Score: 4, Insightful

      But no one knows what the odds are of a getting all the conditions right for life to start.

      If you assume that life must be everywhere, then you have to assume that those odds are pretty good.
      If you assume that life isn't everywhere, then you have to assume that the odds are not very good.

      So, In the end that little nugget of information doesn't really help at all. Its just more information that will be viewed through the colored lense of the beholder. In a small kind-of-sort of way, that's what this study is saying.The probability of life existing is determined in a large part by how much researchers assume it to be, rather than on any hard scientific method.

      --
      Well.. maybe. Or Maybe not. But Definitely not sort of.
    2. Re:Nearly a certainty by CanHasDIY · · Score: 1

      Well, if ND(G?)T said it, I'm inclined to agree.

      Side note: Both Tyson and Michio Kaku were on the Daily Show last night, talking about the plan to mine asteroids; Linky

      Is it me, or does Tyson come off as the rock star of astrophysics?

      --
      An enigma, wrapped in a riddle, shrouded in bacon and cheese
    3. Re:Nearly a certainty by VortexCortex · · Score: 1

      If you assume that life isn't everywhere, then you have to assume that the odds are not very good.

      No, if you assume life isn't everywhere, then you have no idea of just how big the Universe is.

    4. Re:Nearly a certainty by cffrost · · Score: 1
      --
      Thank you, Edward Snowden.

      "Arguments from authority are worthless." —Carl Sagan
    5. Re:Nearly a certainty by ceoyoyo · · Score: 4, Informative

      Except that for there to be a lot of life around the odds can be terrible. In order for us to be the only ones, or nearly so, the odds have to be extraordinarily, next to impossibly bad.

    6. Re:Nearly a certainty by Bill,+Shooter+of+Bul · · Score: 1

      Basically what I'm saying is: why is one assumption of the probability better than the other? In the end, their both assumptions not based on science.

      --
      Well.. maybe. Or Maybe not. But Definitely not sort of.
    7. Re:Nearly a certainty by qwak23 · · Score: 1

      I'm curious as to what you mean by "getting all the conditions right".

      There is a huge difference in odds if there is only one possible combination of localized initial conditions that give rise to life or if there are multiple possible combinations. Based on my current limited knowledge of how the universe works, I would tend to think it's the latter.

      We currently don't have the technology to observe life outside of our solar system, but we have plenty of data concerning this planet which we could use to develop assumptions and possible testable hypotheses.

    8. Re:Nearly a certainty by ceoyoyo · · Score: 1

      "both assumptions not based on science."

      Not really. Remember, the less probable you make life in the universe, the MORE special you make us. Everything we learn (yes, scientifically) suggests that we are not at all special. It may be that there is some absolute showstopper we haven't discovered yet, but all of the scientific evidence we have shows that the conditions necessary for life are common. We have evidence that there are LOTS of planets of the right size, mass and composition in the right places. What we know of physics suggests many or most of those planets should have acceptable physical conditions. Everything we know of abiogenesis suggests that it's likely to happen routinely given the right physical conditions. And all our scientific knowledge of evolution says that it will happen, given self replicating chemical assemblies.

      So all the scientific evidence says that we're nothing special, and therefore life is not improbable.

      Note that the existence of intelligent life contemporary with ourselves has MUCH less evidence either way. Intelligence to a greater or lesser degree seems to be a common invention of evolution, but we don't know anything about how intelligent species stick around. The article itself is talking mostly about intelligent life.

    9. Re:Nearly a certainty by netsavior · · Score: 1

      Not just that, but it is almost certain that 65m~ years ago debris carrying life was ejected from Earth at escape velocity when the rock killed the dinosaurs.

      It almost doesn't matter if life started outside of earth, it has been speeding away from earth for at least 65m years, and probably earlier than that. (from other similar events)

      Even if only some bacteria survived and found purchase on some other rock somewhere, life found a way to settle elsewhere.

    10. Re:Nearly a certainty by Raenex · · Score: 1

      This is of course all just guesses on my part :)

      What you're discussing is the Fermi paradox.

  50. Re:observable data set - 1 planet with life by rundgong · · Score: 1

    Wait, you're telling me that anecdotal evidence isn't the best kind of evidence?

  51. Quantum Mechanics and Life by should_be_linear · · Score: 1

    Maybe life can induce itself thanks to QM nature of physics. As TFA noted, intelligent life is billions years away from its origins. Therefore, it is impossible to find out how it emerged in something like VERY improbable process. Fact that we are observing universe induce (back in time) this event happened, without even needing to define EXACT way it happened. It is only needed to be defined in "resolution" that we can observe today: earliest fossils. Before that, answer can be easily be "unedfined", just like previous path of observed photon. All what we can have is set of probabilities linked with individual theories, all "true" and "false" in the same time.

    --
    839*929
  52. Re:It's "stars" not "suns". by Black+Parrot · · Score: 1

    Same with "moon", right?

    --
    Sheesh, evil *and* a jerk. -- Jade
  53. In My Father's house are many dwelling places ... by garyebickford · · Score: 2

    In My Father's house are many dwelling places; if it were not so, I would have told you; for I go to prepare a place for you. - Johm 14:2

    The usual interpretation of this has to do with Heaven, but who knows? It could mean that we are meant to 'go forth and multiply' and populate the universe. It's just possible that we are the first, the only, and have the potential to propagate Life from its only original source. Maybe that is our calling - to seed Life everywhere. Truly, if/when we do move into space, we will be bringing many other forms of life with us - a significant part of our entire ecosystem.

    I predict that someone will use this quotation and others to inspire a space-based neo-Christian (plus possibly also neo-some other beliefs) religion. And if that is what it takes to get us moving off this planet, I'm for it.

    (See also James Bliss, "A Case of Conscience". An interesting question is raised.

    --
    It's easier to be a result of the past, but more fun to be a cause of the future! http://www.spacefinancegroup.com/
  54. Re:It's "stars" not "suns". by LateArthurDent · · Score: 1

    There is only one Sun, it's a proper noun, and it's our star.
    Please, whomever submitted this story, please get your basic astronomy right.

    That ship sailed long ago. It's like complaining that we talk about the moons of Jupiter instead of calling them Jupiter's satellites.

    For the longest time, the satellite of a planet is a moon of that planet and stars a planet orbits is its sun. When we want to differentiate them, we call our moon by its latin name Luna and our sun by its latin name Sol.

  55. Estimating the odds by GodfatherofSoul · · Score: 1

    The only way with our limited knowledge of the universe is by looking at our solar system and comparing it to others. Our star is normal, after discovering gas giants are often further out from stars (leaving for rocky inner planets), our general layout is normal. About the only things we can say are remarkable (to our current knowledge) is our earth-moon ratio and how the earth's make-up was affected by a massive impact eons ago. IANAA, but from my layman's guess, there's nothing remarkable enough about us to start closing any doors.

    --
    I swear to God...I swear to God! That is NOT how you treat your human!
  56. The Trick Is ... by DakotaSmith · · Score: 1

    ... knowing when we've found it.

    Real extraterrestrials will look nothing like human. They might be super-intelligent shades of the color blue. If we're lucky.

    Differentiating them extraterrestrials and the landscape may be problematic.

    In any case, all the exoplanet talk is entirely speculative. During my lifetime, scientists expected to find life on both Mars and Venus -- and those planets are infinitely closer to Earth than any exoplanet. It was only after sending probes to Venus, for example, that we discovered it was a hell-hole incapable of anything resembling terrestrial life.

    Anyone who tells you they've found an Earth-like exoplanet is flat-out ignorant. We've found exoplanets in roughly the right orbits to possibly sustain human life -- but the same could be said of Venus and Mars, and look how that turned out.

    --
    Microsoft leads to Bluescreen; Bluescreen leads to downtime; downtime leads to suffering.
  57. utter nonsense by khipu · · Score: 5, Insightful

    There is no support either for or against the existence of life on other planets. Bayesian analysis doesn't transform that lack of knowledge into evidence against life. After Bayesian analysis, people still don't have any facts.

    However, I'd say things certainly look better now than they did a few decades ago, given that we have discovered both vast amounts of organic molecules in space, as well as lots of planets in the Goldilocks zone.

  58. Humans cannot understand "infinity" by CityZen · · Score: 1

    or really big numbers, for that matter. So expecting them to understand a fraction like infinity/infinity is really stretching things.

  59. Re:It's "stars" not "suns". by LateArthurDent · · Score: 1

    No, moon is a bit more generic than the Sun.

    It is NOW. The Moon is the proper name for our moon. Which is my point, language evolves. The moment we discovered the Sun was a star, it made sense to call the star a planet orbits its sun.

    Also, "satellite" could refer to a non-natural entity, of course.

    Once again, that's the case now. When Sputnik went up, people felt the need to qualify it as an "artificial satellite," and the term was used for the longest time. Eventually we dropped the "artificial" from it.

    So capitalize Sun and Moon, and if that's not enough for you, use Sol and Luna.

  60. of course it is by holophrastic · · Score: 1

    welcome to inspiration, the gloriful wealth of optimism. that would be the first third of the scientific method from elementary school. Have a question, think about it, take a guess, and start exploring to gather evidence. From there your form a hypothesis and test it. We're currently stuck on that whole evidence thing. And it'll take a while.

    So why is this a surprise to anyone? That we haven't found evidence of earth-like life yet? They do realize that things speed up quite quickly if we ever do.

  61. Re:It's "stars" not "suns". by LateArthurDent · · Score: 2

    Well, apparently "moon" has become generic, but not "sun".

    What's your logical basis for allowing one and not the other?

    Some people are using "sun" as a non-proper reference to other stars

    By "some people," you mean the media, works of literature, and scientific papers.

    but that is being corrected by other people

    A futile attempt to keep language static instead of embracing new meanings. Like all other such attempts, you've already lost.

  62. What are the odds? by MaWeiTao · · Score: 3, Insightful

    Did life come about because of a confluence of circumstances unique to Earth or can it develop and thrive with a fairly broad set of conditions?

    That's the fundamental question, because there are a variety of conditions on Earth that are relatively unique. But did live develop here specifically because of those conditions or was it only shaped because of them? I mean, if you examine life everything fits just right but what we have is a chicken and egg scenario.

    Keep in mind that if life were as resilient and adaptable that we should be finding evidence of it surviving elsewhere within our own solar system. So far we haven't found anything which would imply that specific conditions are required. But how specific are the requirements. Earth isn't tidal locked, we've got a large satellite and a fairly stable star, plate tectonics, amongst countless other things. So who knows what the real odds are. I will concede, however, that it's far from being too late to find something on a neighboring planet.

    I do like being optimistic about this, however, so I want to believe that life should be common. However, given the vastness of the universe "common" is an extremely relative term. What are the odds of finding complex multi-cellular life within a distance we can realistically travel? And what are the odds of finding life that is thriving within our time frame. Chances are that most life gets snuffed out long before it's able to evolve into anything noteworthy.

  63. Taylor says: by Otis+B.+Dilroy+III · · Score: 1

    "I can't help thinking that somewhere in the universe there has to be something better than man. Has to be."

  64. Not facts by Chirs · · Score: 1

    We have a sample size of one. We cannot generalize from this. We have never created actual "life" in the lab...only the precursors.

    Basically we have no idea how likely it is that life arises given the right conditions.

  65. Re:In My Father's house are many dwelling places . by Jeremi · · Score: 1

    Besides, you will have all the proof you need that man is not alone around 2030. End of discussion.

    Haha, the joke's on you -- the world ends on December 21st of this year. Your proof will arrive too late, the Mayans said so!

    --


    I don't care if it's 90,000 hectares. That lake was not my doing.
  66. Re:Omnipotent??? by networkBoy · · Score: 1

    Yes, I realize that, and even thought about correcting myself but did not, so now instead I apologize to an AC, but heck, we're rationally discussing God on /. so I suppose he exists, as here before me I see a miracle :P

    --
    whois gawk date unzip strip find touch finger mount join nice man top fsck grep eject more yes exit umount sleep dump
  67. How you know? by Taco+Cowboy · · Score: 1

    Leave your absentee landlord out of it.

    How you know *HE* is an absentee landlord?

    You have seen *HIM* before ???? :/

    --
    Muchas Gracias, Señor Edward Snowden !
    1. Re:How you know? by yotto · · Score: 1

      Well if he had seen Him before, he'd probably not call Him an absentee landlord.

  68. Data Point of One by ThePeices · · Score: 1

    If life can arise, evolve and thrive in this solar system, then it can do the same elsewhere. There is no "special physics" occurring in this solar system that makes life here any more possible.

    I see nothing whimsical about the possibility of extraterrestrial life, Its pretty much a given due to the numbers involved.

  69. You don't know how big it is. by mosb1000 · · Score: 1

    I would just like to point out that you actually have no idea how big the universe is.

    1. Re:You don't know how big it is. by HappyHead · · Score: 1

      I would just like to point out that you actually have no idea how big the universe is.

      It's not a matter of knowing how big it is, it's a matter of knowing how small it isn't.

      "Space is big. You just won't believe how vastly, hugely, mind- bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space." - Douglas Adams

  70. We never consider time by Anonymous Coward · · Score: 1

    While I believe that life is probably ubiquitous throughout the Universe...

    If you accept that the Universe is roughly 13 billion years old...
    And life formed on this planet roughly 3.5 billion years ago...
    And you accept that the nearest star is four light years away, and we have had radio communication technology for roughly 100 years...
    And that we know of no way to communicate faster than the speed of light...

    The odds of any intelligent life communicating with us in the .00000000769 th of the age of the Universe that we have been able to communicate are pretty much nil. Add to that the drop in transmission energy as the signal spreads through space, and the communication would be a faint whisper. Even assuming that other civilisations existed simultaneous with ours, with the ability to communicate, outgoing messages may not reach the intended audience before the collapse of either civilisation.

    We are the first species on our planet that realises that the planet is ultimately doomed. It is going to take robots terraforming and gathering resources to help us leave this planet. Getting to Mars will be a huge undertaking. Leaving the inner planets will be monumental. Leaving the solar system will take every ounce of ingenuity of generations. If we don't complete these tasks, it is very unlikely that we will find life, intelligent or otherwise, before our collective demise.

    The math is clear. The dire march of time is against us.

  71. Re:observable data set - 1 planet with life by qwak23 · · Score: 1

    I'm still not certain that we've confirmed the existence of life on Earth.

  72. Has it happened more than once on Earth? by Aristos+Mazer · · Score: 1

    One way to judge how frequent life arises would be to check how often it has independently occurred on Earth. Do we have any species that share no genetic material with any other species? I've heard stories that mushrooms are completely orthogonal forms of life, but those same sources typically label them as extraterrestrial. That's just a story I heard... no idea if it is true or not. If the conditions on Earth are right for life, then perhaps we should occasionally see life appear ex nihilo. To the best of my knowledge, we have never observed that.

    Given this, it seems like we would judge the formation of life to be pretty unlikely.

  73. Middle age... by ArturoBandini77 · · Score: 1

    It's INCREDIBLE how, in 2012, when we know there are + than trillion of "stars" out there, that we still think we are the only (intelligent?) for of life in the universe...
    It's like still thinking that earth is flat... In 2012...
    Simply ridiculous...

  74. The point of the Drake equation by Nicolas+MONNET · · Score: 1

    is not to compute its result, it is to show how much we do/don't know.

    We're slowly, or quickly depending on your outlook, filling in the gaps. We now have enough data on extrasolar planets to do statistical extrapolations.

    In the next decade or two, we will have telescopes nearly large enough to do spectroscopic analysis of the atmosphere of nearby extrasolar planets. In particular we will be able to see if they have significant dioxygen, which can only happen as a result of life as far as we know. That will remove another unknown value.

    Advances in neurology and evolutionary biology will begin to highlight how likely it is for intelligence to evolve.

  75. space-borne life? by whitroth · · Score: 1

    Neither in the piece that I skimmed, nor in anyone's comments, has addressed the biochemicals observed in space, both in the solar system and out of it (lessee, it was a few years ago that astronomers noted a nebula with alcohol in it, leading /. readers to suggest that fratboys will be pushing to head that way asap). Further, I belive probes have found evidence of earth-bacteria out there.

    It's all over the place....

                  mark

  76. Re:In My Father's house are many dwelling places . by Raenex · · Score: 1

    Besides, you will have all the proof you need that man is not alone around 2030. End of discussion.

    Oh, great. So we'll all just be quiet until then, oh wise one and powerful one. *snort*

  77. Mortal Awareness by hutsell · · Score: 1

    I for one consider living matter needing to fuel its existence by eating other living matter as its fuel to be a dead end in the evolutionary process. Is this the only way it can develop in what appears to be an eternally infinite Universe? I'd like to think they're other ways.

    However, if so, Earth to an outsider (if their is such a thing capable of being in that position) surely would seem to be operating like a ball of acid--completely covered with a bunch of psychotics consuming each other--something to be avoided at all cost.

    Beacon Warning: This Sector Off Limits

    --
    Yesterday's Weirdness is Tomorrow's Reason Why
  78. Re:UFOs ignored on Slashdot? by gottabeme · · Score: 1

    Well, modded troll for asking a simple question. Guess that proves my point. Way to go, Slashdot.

    --
    "Those who consume the bulk of goods are those who make them. We must never forget this secret of our prosperity."
  79. Re:In My Father's house are many dwelling places . by rusty0101 · · Score: 1

    I hold the view that this really is more along the lines of saying that there is not just one faith that involves god. If you allow that there are literally hundreds of christian sects, a couple of different Jewish and Islamic sects (each) there are at least three well recognized 'dwelling places' that are within 'My Father's house'.

    If you look at what each faith teaches, you will find far more in common, than separate. Almost every faith recognizes both that killing is wrong, but sometimes necessary. Stealing from one another is almost always discouraged in one way or another, but very few discourage taking from those outside of the faith.

    Who among us truly knows "My Father" well enough to say that those following what we think is a different path are not following the same god?

    Personally I think that all religions are the first level of governance beyond the family. They give us a means of building a community. That community allows us to accomplish more than any of us as individuals can do. And those accomplishments build upon each other as our communities start working with each other.

    But that's a personal view, and I'm well aware that it runs counter to the public statements of many religions. I don't claim not to be heretical to those religions. I don't claim to be closer to 'my God' or yours, or have a better fundamental understanding of how the world works in your mind than you do.

    --
    You never know...