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Martian Sea Discovered

mpesce writes "New Scientist is reporting that a large sea of frozen ice (between 800 and 900 km in size and 45 m deep) has been discovered by the ESA's Mars Express Probe. Here's the kicker: the sea of block ice is only five degrees away from the Martian equator. New Scientist also links to a PDF of a paper to be presented next month about the finding." Update: 02/21 15:30 GMT by T : Note: that's 45 meters deep, not 45 kilometers deep.

118 of 508 comments (clear)

  1. Wow... by MalaclypseTheYounger · · Score: 5, Funny

    A large sea of frozen ice??

    As opposed to the other kinds of ice, like liquid ice or gaseous ice?

    Here's your sign...

    Awesome, though. I can't wait for us to terraform Mars, and start our new civilization there.

    And eventually ruin that planet as well. :)

    --
    Check out the best P2P sharing website: MEDIACHEST.COM
    1. Re:Wow... by puiahappy · · Score: 5, Funny

      Maybe in a few years we will be able to choose from 3 diffrent tipe of water : 1. Mineral 2. Natural 3. Martian ;)

      --
      Think like a hacker, act like a hacker, but never become a hacker !
    2. Re:Wow... by TykeClone · · Score: 5, Funny
      And eventually ruin that planet as well. :)

      Wouldn't terraforming Mars ruin it - at least in respect to its natural state?

      Everyone knows that nature is static, and how things were 50, 100, or 1000 years ago are the way that they should be today, tomorrow, and forever!

      --
      A fine is a tax you pay for doing wrong and a tax is a fine you pay for doing all right.
    3. Re:Wow... by Glock27 · · Score: 4, Informative
      As opposed to other kinds of ice like dry ice.

      The proper term is "water ice" as opposed to "dry ice" which is frozen carbon dioxide.

      --
      Galileo: "The Earth revolves around the Sun!"
      Score: -1 100% Flamebait
    4. Re:Wow... by Cat_Byte · · Score: 4, Funny

      Duh...we would have seen the oil wells sticking up out of the ground.

      --
      Two roads diverged in a wood, and I - I took the one the bus load of girls just went down.
    5. Re:Wow... by mwood · · Score: 3, Funny

      According to Cary Rockwell, Martian Water is actually a brand of soft drink. Its main use is to get you insulted when you ask for it in tough merchant spacer bars.

    6. Re:Wow... by mwood · · Score: 5, Funny

      Actually, I think that the Earth of 3.5 billion years ago is its "natural" state. All this oxygen and these invasive species (all plants, animals, and basically anything other than anaerobic bacteria) must go! :-)

    7. Re:Wow... by mwood · · Score: 2, Insightful

      Ya mean, like those derricks that the Indians had built all over Texas, before the white man stole them?

    8. Re:Wow... by cinnamon+colbert · · Score: 2, Interesting

      I suppose if u had super small (~ 100 nanometer) particles of ice, you would have a stable suspension in air - so it wd be sort of gaseous ice

    9. Re:Wow... by CptNerd · · Score: 5, Funny

      Your sarcasm detector needs work.

      Here's your sign.

      --
      By the taping of my glasses, something geeky this way passes
    10. Re:Wow... by Hard_Code · · Score: 4, Insightful

      "Imagine living on a planet where you get tax breaks for driving big inefficient vehicles that produce greenhouse gases."

      Um, we ALREADY DO.

      SUV, truck owners get a big tax break
      CONs of the SUV Tax Break

      --

      It's 10 PM. Do you know if you're un-American?
    11. Re:Wow... by Doc+Ruby · · Score: 3, Interesting

      Don't worry, it's going - very, very quickly.

      --

      --
      make install -not war

    12. Re:Wow... by Rod+Beauvex · · Score: 4, Funny

      Or even....Vanilla Ice! *rimshot*

    13. Re:Wow... by Anonymous Coward · · Score: 2, Interesting

      Now, I'm not sure how the parent got tagged as funny, because I see it more as insightful or interesting. Right now, Mars is in its natural state, and changing it to fit our needs would be destroying that natural state. The same thing has happened here on Earth. The natural state was moved aside to make room for roads, buildings, and other things that did not occur in our natural ennvironment. What's interesting is that these developments are not bad. For the most part they have increased our quality of life. So, terraforming Mars may destroy its natural state, but would that be so bad, especially if it does turn out to be uninhabited?

    14. Re:Wow... by DogsBollocks · · Score: 5, Insightful

      A new perspective.

      I spent several years working in and around the small northern communities in Canada's Arctic.

      The Inuit population there refer to water as "molten ice", because ice is the most common state.

      Were as we southerners (south of the arctic circle) consider ice as frozen water.

      Oh well, I thought it was funny.

    15. Re:Wow... by Rei · · Score: 4, Funny

      You know... that's the first time I've ever seen such internet shorthand as "u" and "wd" along with phrases like "~100 nanometer particles" and "stable suspension". ;)

      --
      "Lock and load, Brides of Christ!"
    16. Re:Wow... by metlin · · Score: 4, Funny

      Maybe in a few years we'd be able to choose from 3 different types of spelling : 1. Good 2. Bad 3. Slashdot ;)

    17. Re:Wow... by Skjellifetti · · Score: 2, Informative

      The phenomena is called ice fog.

    18. Re:Wow... by mickyflynn · · Score: 2, Insightful

      the Electoral College prevents people from just appealing to the States with the most votes. Remember, the Federal Government did not create the States, the States created the Federal Government. This is not a unitary country like Ireland or something. it's a federation of the several states. The Electoral College is an insitution which preserves this and is a founding principle. Further, the States dont even have to allow people to vote for anything but the House of Representatives. State Legislatures could just throw up whatever votes for the College they wanted to and it would be perfectly constitutional. Democracy is stupid and dangerous. Look at the French Revolution.

    19. Re:Wow... by maxwell+demon · · Score: 2, Funny

      You don't need too many people for starting a colony. After all, people tend to reproduce themselves. Now you might say you need a minimum population to allow for a certain genetic variability. But then, you can just transport enough frozen sperm with you (and also the female equivalent, of which I just don't remember the English term).

      --
      The Tao of math: The numbers you can count are not the real numbers.
    20. Re:Wow... by tompaulco · · Score: 2, Insightful

      Actually, if we really did evolve from amoebas, then we are very much part of nature and everything we do is therefore quite natural.
      On the other hand, if we were made by God, then we can argue that the things we are doing are not natural, because we are separate and above nature.

      --
      If you are not allowed to question your government then the government has answered your question.
    21. Re:Wow... by HD+Webdev · · Score: 2

      After we've figured out how to properly warm up this planet, we'll be ready to "civilize" mars.

      We won't be able to figure that one out.

      After all, during each very cold winter we talk about global cooling and what we need to do to save the planet from freezing up.

      Then, we run into a really hot summer and try to figure out how to cool everything down before we get run out of Coppertone[tm] and get cancer.

      There is a several year attention span on the general consensus of which we need to do so we will never get the job finished.

      --
      This is not a dream, not a dream...we are transmitting from the year 1-9-9-9.
  2. Many are cold, but few are frozen. by Anonymous Coward · · Score: 5, Funny
    ... of frozen ice ...

    Not like the kind we get here, then.

  3. 45 *meters* deep by pfdietz · · Score: 5, Informative

    That's 45 meters deep, not kilometers.

    1. Re:45 *meters* deep by Council · · Score: 5, Funny

      And it's 900km BY 800km, not BETWEEN the two, as another poster said.

      And it's not actually near the Martian equator, but in Canada.

      --
      xkcd.com - a webcomic of mathematics, love, and language.
    2. Re:45 *meters* deep by dreamchaser · · Score: 4, Funny

      Hey, this is Slashdot. Since when do you expect accuracy?

      Slashdot: News for Nerds, Editors who don't Edit ;)

      The jury is still out as to whether it's really ice or not. Still, the possibility is enticing. Not only would it be a much needed resource for manned exploration, but it also would greatly increase the chances of life existing there.

    3. Re:45 *meters* deep by dr.+greenthumb · · Score: 2, Funny

      No, it's metres, not meters! :P

    4. Re:45 *meters* deep by AndroidCat · · Score: 2, Insightful

      Not even the excuse of metric/imperial conversion. Innumeracy is a problem these days. A few weeks ago there was a story in the Toronto Star that said the new European plane was 20,000 tons heavier than the 747. Didn't anyone stop to think about the big hole that would make in the runway, never mind the takeoff problems?

      --
      One line blog. I hear that they're called Twitters now.
    5. Re:45 *meters* deep by misleb · · Score: 4, Insightful

      If US citizens can't drink the water in Mexico, I seriously doubt we'll be able to drink the water on Mars. Hopefully for the same reasons...

      -matthew

      --
      "THERE IS NO JUSTICE, THERE IS ONLY ME." -Death
    6. Re:45 *meters* deep by MaGogue · · Score: 2, Insightful

      Not only would it be a much needed resource for manned exploration, but it also would greatly increase the chances of life existing there.

      Regrettably, the two are mutually exclusive.. isn't it interesting - the more Earth-like the conditions, less likely it is that we will explore the place anytime soon, not to 'spoil' it?

      We are basically doomed to not go to places we'd REALLY like to go, and to dig in the Moon dirt at best.

  4. How many kilometers? by dorward · · Score: 5, Informative

    That's 800km by 900km (i.e. 800km wide and 900km long). It isn't between 800km and 900km!

    1. Re:How many kilometers? by The-Bus · · Score: 3, Funny

      How many Libraries of Congress squared is that? Or is the measurement more like LoC / VW because of the Martian moon rocks?

      No, seriously. That's like really small right? Like 1/100ths of an inch?

      --

      Small potatoes make the steak look bigger.

    2. Re:How many kilometers? by Cat_Byte · · Score: 4, Funny

      Uhh...is this American football or that other football that is kinda like soccer? Here we go again...another measurement system with international differences.

      --
      Two roads diverged in a wood, and I - I took the one the bus load of girls just went down.
    3. Re:How many kilometers? by klmth · · Score: 2, Funny
      You've got your units messed up. The ice field it's 5.166677 × 10^15 football fields For your reference, here's a handy chart of the Internation Press Unit System:
      • Area: Football Fields. Defined as 60x100 square yards, or 501.6 square meters. The European equivalent is the tennis court, which is 668.9 square meters.
      • Volume: Volkswagen Beetle. Defined as 9.75 cubic metres.
      • Information: Library of Congress. Defined as 10 terabytes.
      • Length: One marathon. Defines as 42.5 km.
      • Length: One hair. Defined as 100 microns.
      • Currency: US National debt. Defined as 8 Trillion dollars.
      HTH, HAND.
    4. Re:How many kilometers? by cdrudge · · Score: 5, Informative
      Area: Football Fields. Defined as 60x100 square yards, or 501.6 square meters. The European equivalent is the tennis court, which is 668.9 square meters.
      You don't happen to be a NASA scientist by chance, are you? You are off on your order of magnitude on your yards to meter conversion. 6,000 sq yards is ~5016 sq meters.

      And what type of tennis do you play? 668.9 sq meters? Good grief. A US doubles court is 36 feet x 78 feet (~261 sq meters). Unless you are also including in the areas around the court, I can't see where your 668.9 sq meters came from.
  5. nothing of the sort by SkunkPussy · · Score: 5, Informative

    they have not detected any form of frozen sea, they have merely found some peculiar formations that they hyopthesise may be blocks of ice covered in volcanic ash (which has prevented it subliming into the atmosphere). Another hypothesis is that these formations may have been caused by lava flows.

    --
    SURELY NOT!!!!!
    1. Re:nothing of the sort by essreenim · · Score: 5, Interesting
      The interesting point is that's its ice close to MArs equator albeit underground. This is significant if true as that far down there are sure to be thermal vents from volcanoes keeping the water above zero and hence providing a greater probability of simple organic life.

      FUCK Roland Piquepaille's blog articles, devoid of content. Copy this sig if you agree!

      Yeah! Screw'em

    2. Re:nothing of the sort by enosys · · Score: 4, Informative

      All volcanic activity on Mars has ceased. Could there be any vents?

    3. Re:nothing of the sort by Ayaress · · Score: 5, Informative

      I don't think there is liquid magma, since all the papers and articles from probes that I've read have never said anything about significant activity like earthquakes (Marsquakes?). Also, the lack of a substantial mangnetic field suggests a solid core (Venus, on the other hand, lacks a magnetic field because it's rotational rate is so slow). Venus also shows signs of relatively recent and catastrophic volcanic activity. It's atmostphere is volcanic, it has very few craters on its surface, and those that are there are young and well-defined. It doesn't have older partially eroded craters, but there are a few partially covered in lava flows or with their rims still protruding above lava fields. The youngest Martian lava flows are older and smaller, suggesting not only a lack of recent activity, but a decline in activity before it stopped. Anyway, like you said, this IS, nonetheless, probably our best bet for finding existing life, or signs of past life. It doesn't neccessarily take heat for life to survive, although life in every form we've encountered thus far (Not that we really have an abundance of data to go on) at least required heat to start, which Mars once had just as much as Earth. Near the equator, it's not that cold. The conditions in those ice packs may be no worse than some arctic conditions on Earth. Life probably couldn't form there, but it could certainly survive there.

  6. Water is Life by Fox_1 · · Score: 5, Interesting

    Woot!
    err maybe not, still not enough information but I tell ya all those stories I read growing up seem a little closer now - Edgar Rice Burroughs maybe was a little off in his vision of the planet - but Kim Stanley Robinson or Aurthor C. Clarkes visions may be in reach now. With water on the planet , and it being accessible to us gives any future mission to mars a valuable resource.
    I'm 'pumped' so to speak.

    --
    The rock, the vulture, and the chain
  7. Meters not Kilometers... by BlacKat · · Score: 5, Informative

    "(between 800 and 900 km in size and 45 km deep) "

    According to TFA the depth is 45 METERS deep, not 45 KILOMETERS. ;)

    There is quite a difference between the two... :)

    1. Re:Meters not Kilometers... by NanoGator · · Score: 2, Funny

      "According to TFA the depth is 45 METERS deep, not 45 KILOMETERS. ;)"

      Just one more reeason to use the english system...

      --
      "Derp de derp."
  8. 45km deep? by frdmfghtr · · Score: 3, Informative

    I didn't think so either...

    The team of researchers, led by John Murray at the Open University, UK, estimates the submerged ice sea is about 800 by 900 kilometres in size and averages 45 metres deep.

    --
    Government's idea of a balanced budget: take money from the right pocket to balance...oh who am I kidding?
  9. And that little speck off to the left... by bobdotorg · · Score: 5, Funny

    ... is a bewildered and gasping Arnold Schwarzenegger waiting for the nuclear heating coils to kick in.

    --
    __ Someday, but not this morning, I'll finally learn to use the preview button.
    1. Re:And that little speck off to the left... by first.last · · Score: 2, Funny

      Californians should be so lucky.

      --
      Wishing I was a millionaire since 1969.
  10. In other news.. by LittleGuernica · · Score: 5, Funny

    In other news, Michelle Kwan has announced she will be training for the 2006 Olympics on a secret "remote" location, devoid of paparazzi.

    Insiders say she also aquired a new sponser, an undisclosed candy bar manufacturer..

  11. Excellent for setting up a Mars colony... by Wonderkid · · Score: 4, Funny

    ...if we melt the water. And my tounge in cheek Mars Hydro website may well fortell a commercial future too? :-)

    --

    O'WONDERWe're working on it.

    1. Re:Excellent for setting up a Mars colony... by SnapShot · · Score: 4, Funny
      Don't stop there. Mars is a gold mine! Think of the patent opportunities:
      • Single-click purchase ON MARS
      • Hyperlinks ON MARS
      • Huffman compression ON MARS
      • Laser pointer as a cat excersize tool ON MARS

      There's money to be made, my friend, on the new frontier.
      --
      Waltz, nymph, for quick jigs vex Bud.
  12. Re:wow by qw(name) · · Score: 5, Informative

    The /. descript is little misleading. From the article:
    A frozen sea, surviving as blocks of pack ice, may lie just beneath the surface of Mars...
  13. Sea? by Anonymous Coward · · Score: 5, Informative

    Here's the title of the article:

    'Pack ice' suggests frozen sea on Mars

    Here's the summary of the ./ posting:

    ...that a large sea of frozen ice (between 800 and 900 km in size and 45 km deep) has been discovered...

    Do ./ poster even RTFA?

  14. Great! by Netsensei · · Score: 5, Funny

    Now astronauts (or kosmonauts or taikonauts or whatever gets first over there) don't have to take ice with them if they want to have a whisky on the rocks.

    Hmm... maybe I could start a first "bar galactica" and make tons by selling spacetourists stiff drinks at high rates.

    "Joe, one lump of frozen ice in my drink if you please!"

  15. James Stinson ain't dead by mmkkbb · · Score: 3, Funny

    He's just colonizing in the name of the Drexciyan Wavejumpers.

    RIP James.

    --
    -mkb
  16. Fear and Loathing in Mars... by pVoid · · Score: 5, Funny
    And eventually ruin that planet as well.

    Well, you see, the whole attraction of mars is that people can go there, terraform it, and then greenhouse the shit out of it and say "Well it was a barren waste land anyways".

    Mars will be the Las Vegas of environmental concerns!

    1. Re:Fear and Loathing in Mars... by MalaclypseTheYounger · · Score: 2, Insightful

      As long as there are hookers and blackjack, people will vacation there in droves.

      I think we should use the moon as our garbage dump. Save Mars as a possible 2nd home when that big asteroid finally smashes into Earth and makes it uninhabitable for a few decades/centuries/eons.

      Funny how greenhouse gases are supposed to 'save' Mars and make it hospitable though, but are destroying our own planet. I guess that means I get to use my old aerosol hairspray and put leaded gasoline in my car, and use the old RJ-12 Freon when I eventually migrate to Mars.

      --
      Check out the best P2P sharing website: MEDIACHEST.COM
    2. Re:Fear and Loathing in Mars... by Cat_Byte · · Score: 2, Funny
      I guess that means I get to use my old aerosol hairspray and put leaded gasoline in my car, and use the old RJ-12 Freon when I eventually migrate to Mars.

      Well...I do miss the 80s...maybe there is hope. As long as we can redo the 80s without Michael Jackson...

      --
      Two roads diverged in a wood, and I - I took the one the bus load of girls just went down.
    3. Re:Fear and Loathing in Mars... by geoffspear · · Score: 2, Interesting
      Well, since Earth is having trouble keeping the huge sheets of ice at the poles intact, while Mars has ice in the tropics, it's not hard to se that gloabl warming on Earth to make it more like Venus would be bad, while global warming on Mars to make it more like Earth would be good, at least as far as the ability for humans to survive is concerned.

      Of course, I think the distance from the Sun seems like a much bigger barrier to getting Mars to be warm enough to be habitable than the atmosphere. I'd think even with a Venus-like atmosphere it would take a damn long time for enough energy to get trapped to warm it up to an Earthlike temperature. And that's after the amount of time it would take to actually change the atmosphere that much.

      --
      Don't blame me; I'm never given mod points.
    4. Re:Fear and Loathing in Mars... by kereira · · Score: 2, Interesting

      Just because we found ice there doesn't mean it's going to be habitable by human lifeforms ;) I mean, do /you/ think we can live off frozen water by the martian equator?

      Maybe we could develop another form of intelligent life that would be able to handle Martian environments. Or shove some random small animal there that is not necessarily intelligent but could handle it and see what it evolves into after a few billion years.

      I just don't think we'll be moving there too soon :P

      --
      I don't not believe there isn't a God.
    5. Re:Fear and Loathing in Mars... by Hooptie · · Score: 2, Funny
      with summer highs around +1F (-17.2C), do you really think you will need RJ-12 on Mars?

      Hooptie

      --
      "Heavens, it appears that my weewee has been stricken with rigor mortis!" -- Stewie Griffin
    6. Re:Fear and Loathing in Mars... by stfvon007 · · Score: 2, Funny

      So lets just keep making greenhouse gasses here, but instead of putting them in the atmosphere, bottle them and send them to mars. Two problems solved.

      --
      All misspellings and grammatical errors in the above post are intentional and part of my artistic expression.
    7. Re:Fear and Loathing in Mars... by budgenator · · Score: 2, Interesting

      bottle them and send them to mars.
      That's a rather expensive solution a bit cheaper would be to
      1. make torpedoes out of water ice,
      2. pour in the liquid CO2
      3. vent the torpedoe to freeze the CO2
      4. cap the torpedoe with water
      5. drop the torpedoes into the ocean over a deep trench

      The torpedoes would of course disolve/melt and the CO2 would stay liquid in the high preasure and cold sea bed and flow into the ocean bottom sediments and react with the minerals there.
      This would be much less expensive than lifting the CO2 out of the Earth's gravity well, then again out of the sun's well.

      --
      Apocalypse Cancelled, Sorry, No Ticket Refunds
    8. Re:Fear and Loathing in Mars... by FireBook · · Score: 3, Informative

      Seriously though, one problem with making mars habitable enough to live on without domes or breathing equipment is exceedingly hard to beat. That is mar's mass isn't high enough to generate a gravity well large enough to sustain enough atmospheric pressure to live on the surface.
      Even with a gradual depressurisation (of people wanting to survive on the surface without a complete space suit including some form of counterpressure) to martian pressure would be a killer.
      As far as i am aware the planet's atmosphere is in equilibrium, that is, the amount of gasses there and the pressure they are at is sustained to the fullest extent of the gravity of the planet. Adding more gasses in some way to increase the atmospheric pressure would not help because it would boil off into space. And don't even get me started on the lack of a protective magnetic field.

      --
      My other OS is also FreeBSD
  17. Gary Larson cartoon by Redwin · · Score: 3, Funny

    I could just picture first detailed images of the sea coming back with a frozen martian with a slightly suprised look on its face frozen under the ice. :-)

    --
    Warning, comments may not have been passed by the sanity department of my brain.
  18. Makes you wonder about the guys at Science... by gloth · · Score: 5, Interesting

    It wasn't too long ago that the guys from the Science magazine compiled their list of the 10 most important breakthroughs of 2004. Ranked 1 were the Mars rovers. For all I remember, Mars Express delivered probably at least as many new insights, if not more, but it was notably missing in that list. Why's that? Just because it doesn't have wheels to drive around, or is it the lack of an american flag on its side? Or what exactly is it that puts the rovers into a league of their own?

    1. Re:Makes you wonder about the guys at Science... by Anonymous Coward · · Score: 2, Funny

      Its because they mistitled their list, due to not feeling that "top ten [science] things we got a hard-on for this year" had the required gravitas...

    2. Re:Makes you wonder about the guys at Science... by drinkypoo · · Score: 2, Insightful

      On one hand we're talking about mars express, a probe, and on the other hand we're talking about throwing two remote-controlled cars at a planet, airbraking them using big balloons, bouncing them around Mars, and opening them up, then driving around the planet's surface collecting high-resolution images of anything we care to look at... so long as it's not very high off the ground. I'd say that puts them in a league of their own.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  19. Hey Quaid , I got 6 kids to feed! by cecchino1 · · Score: 2, Funny

    Seen the movie Total Recall?

    looks like someone needs to activate the martian oxygen maker thing.

    Arnie Quotes
    "Consider that a divorce!"
    "Get your ass to Mars...get your ass to Mars..."
    "MY NAME IS NOT QUAID!"
    "If I'm not me, who da hell am I?"
    "That's the best mindf___ yet."

  20. Office of Redundancy Department by Engineer-Poet · · Score: 3, Insightful
    the whole attraction of mars is that people can go there, terraform it, and then greenhouse the shit out of it...
    Except that terraforming it involves greenhousing the shit out of it first. ;-)
    1. Re:Office of Redundancy Department by pauljlucas · · Score: 3, Informative

      That would be the Department of Redundancy Department.

      --
      If you reply, do so only to what I explicitly wrote. If I didn't write it, don't assume or infer it.
  21. Re:The real question is.. by DigiShaman · · Score: 2, Funny

    What I want to know is...just how big of a splash can I make on a planet that has less gravity of Earth.

    --
    Life is not for the lazy.
  22. Some calculation by Capt'n+Hector · · Score: 4, Informative

    From some random site, the volume of Earth's oceans is 1.3*10^9 km^3. That's roughly 40,000 times as much water as what was just found on Mars. Inferring the existance of even more water on Mars, and taking into account the fact that Mars is smaller than Earth (surface area of Earth is ~ 6.65 times that of Mars?), you might say the avearge ocean depth of Earth is at most 6000 times greater than that of Mars. Not too friggin bad, let's terraform this sucker.

    --
    Quid festinatio swallonis est aetherfuga inonusti?
    Africus aut Europaeus?
    1. Re:Some calculation by PMuse · · Score: 2, Informative

      So, how much water are we talking about? This Martian block ice is 800-900 km in size, 45 m deep. If surface area = (800/2)^2*pi= 500000 km^2, then volume is 500000*(45/1000) = 23000 km^3 (using these very rough data). By comparison, these terrestrial lakes have similar volumes, areas, or depths.

      Caspian Sea (Eurasia), vol 78200 km^3, area 374000 km^2, depth 209 m
      Lake Baikal (Eurasia), vol 23000 km^3, area 31500 km^2, depth 730 m
      Martian Block Ice (Mars), vol ~23000 km^3, area ~500000 km^2, depth 45 m
      Lakes Michigan and Huron (North America), vol 8,456 km^3, area 117318 km^2, depth 72 m
      Lake Victoria (Africa), vol 2750 km^3, area 68800 km^2, depth 40 m

      See also
      http://home.comcast.net/~igpl/Lakes.html
      ht tp://www.gemswater.org/atlas-gwq/table7-e.html
      ht tp://www.epa.gov/glnpo/physfacts.html

      --
      "We reject as false the choice between our safety and our ideals." --The American President (20.1.2009)
  23. tres errrores by Anonymous Coward · · Score: 5, Interesting
    "New Scientist is reporting that a large sea of frozen ice (between 800 and 900 km in size and 45 km deep)

    It's amazing to me that the submitter could make three errors in the first half of the first sentence of his submission.

    It's not between 800 and 900 in size, it is 800 by 900.
    It's 45 meters deep, not km.
    Frozen ice? Well, duh.

    it's powers of observation and recounting as keen as these that make eye witness testimony so compelling.

  24. war of the worlds by nounderscores · · Score: 2, Funny

    "No one would have believed in the first years of the 21st century that this world was being watched keenly and closely by intelligences greater than Martians' and yet as mortal as his own; that as Martians busied themselves about their various concerns they were scrutinised and studied, perhaps almost as narrowly as a Martian with a microscope might scrutinise the transient creatures that swarm and multiply in a drop of water. With infinite complacency Martians went to and fro over this globe about their little affairs, serene in their assurance of their empire over matter. It is possible that the infusoria under the microscope do the same. No one gave a thought to the older worlds of space as sources of Martian danger, or thought of them only to dismiss the idea of life upon them as impossible or improbable. It is curious to recall some of the mental habits of those departed days. At most Martian men fancied there might be other men upon planet three , perhaps inferior to themselves and ready to welcome a missionary enterprise. Yet across the gulf of space, minds that are to our minds as ours are to those of the beasts that perish, intellects vast and cool and unsympathetic, regarded this mars with envious eyes, and slowly and surely drew their plans against us. And to mars in the 21st century came the great disillusionment."

  25. Does anyone know? by bryan1945 · · Score: 4, Funny

    I wonder if Martians can ice skate? If so, perhaps we could import them here and have a hockey season. Imagine ESPN's ratings for the Mars Cup!

    --
    Vote monkeys into Congress. They are cheaper and more trustworthy.
    1. Re:Does anyone know? by goober1473 · · Score: 3, Funny

      Good point, must be about time that the US expanded the baseball to become the Universe Series, doesn't matter if the rest don't play it'll be just like the World Series now ;)

    2. Re:Does anyone know? by yintercept · · Score: 2, Funny
      must be about time that the US expanded the baseball to become the Universe Series, doesn't matter if the rest don't play it'll be just like the World Series now ;)

      Baseball on planets will a lesser mass might be fun. Play baseball on a really small moon or big asteroid and you will hear the announcer truthfully exclaim: "He put that one into orbit..."

  26. Re:wow by ChuckSchwab · · Score: 2, Insightful

    Good point. I love how the slightest hint of water - which could mean something else - is taken as iron clad proof that there is water on Mars. Remember when sediment was found at the bottom of basins on Mars, and they thought that was their proof? Frankly, I'm waiting for them to bring back a pitcher (of water).

  27. Mirror to the PDF. by tetrahedrassface · · Score: 5, Informative
    Here is a mirror to the PDF.

    http://209.235.176.54/1741.pdf

    Its temp webspace for www.foxcheck.org. Have fun. And we want to live in peace with our /. overlords!

  28. The whole Mars thing... by GNUThomson · · Score: 3, Funny

    Who came with that stupid idea to name a planet after candy bar, anyway? That's outrageous!

  29. Re:how many ice cubes in a km? by FLAGGR · · Score: 2, Funny

    Since when were km french? You must mean your TheRestOfTheWorld-to-BackwardsAmericanWay cheat sheet. Notice how all science stuff is in metric, it makes more sense (Powers of ten).

  30. Imperial vs. metric units by johannesg · · Score: 2, Funny
    I'm sorry to see the slashdot editors cling to the obsolete imperial meter, which is clearly a very different unit from the metric meter which is used in the actual article. You see, the article refers to a sea that is 45 meters deep (this is presumed to be metric meters), which evidentally translates to a sea that 45 kilometers deep in imperial meters.

    So one imperial meter is the same as a metric millimeter. I gotta remember that...

  31. Re:How is it possible by tetrahedrassface · · Score: 5, Informative
    Sublimation lag quite simply

    In other words the sae was frozen and had a lot sediments in it. As the surface evaporated the sediments were left on top. The sediments in conjunction with vlocanic ash effectively inusulates the sea underneath it.

    Its kinda like an aquifer, except that in this case the aquifer is frozen!

  32. About Terraforming... by Tylo · · Score: 3, Insightful

    If we could terraform Mars, do you really think it would be hospitable? There's more to Earth than water and oxygen that makes it possible for life to live here. The moon, for instance, is just in the right position to affect our tides so they aren't out of control. And the magnetic field that helps move that nasty radiation around us... I wonder what it would mean for Earth if we terraformed Mars, changed it's magnetic field. It might even effect life here. I say we leave Mars alone before we kill ourselves.

    --
    - Tylo
    1. Re:About Terraforming... by vidarh · · Score: 4, Insightful
      The thing is that when people mention terraforming a lot of people automatically assume the only goal that would be sufficient to be useful is to make it possible for humans to live entirely without any form of support.

      But even a minor increase in atmospheric pressure would have a massive impact on the feasability and safety of large domes, for instance, because it would even out the pressure difference between the outside and inside of a habitable dome.

      Just getting to a temperature and atmosphere where humans won't die instantly without a suit, or can work/survive outside in warm clothes and an oxygen mask will have a dramatic impact on how easy it will be to have a sustained presence, and the safety of a colony that would otherwise have to have massive safeguards against damages to habitats.

      Keep in mind that there are many areas on earth that are extremely inhospitable. While it would be great if Mars could once be as hospitable as the more pleasant areas of the earth, that doesn't mean that less won't still make it possible (or even interesting) to live there.

      Humans are quite resilient.

    2. Re:About Terraforming... by Xyrus · · Score: 4, Informative

      "The moon, for instance, is just in the right position to affect our tides so they aren't out of control."

      Not really. We have tides because we have a moon. Without the moon, only the influence of the planets and the sun would affect our tides, which wouldn't amount to much.

      The moon does act as a sort of gyro stabilizer. Because of it's influence, the axis of our planet wobbles in a fairly regular pattern, giving us seasons. Without the moon, that would become more erratic. Indeed, Earth could theoretically be spinning in all thre axes at once, which would make for some interesting weather patterns.

      "I wonder what it would mean for Earth if we terraformed Mars, changed it's magnetic field. It might even effect life here."

      Not likely. Mars at it's closest point is still 40 million miles away. Even if we possesed the technology to give Mars a stronger magnetic field (which we don't), the field strength drops of with the inverse square of the distance. And with the solar wind, that field would be infintismally small by the time it could reach Earth.

      Short of blowing of a large chunk of Mars and sending it crashing into Earth, we're not going to affect our planet.

      "I say we leave Mars alone before we kill ourselves."

      I say we are far more likely to kill ourselves before we even make it to mars. But that's just my opinion.

      Assuming we don't practice the great art of self-annihilation, we won't have much of choice of going to Mars in the relatively near future. Our planet is filling up. We have limited resources. We'll have to do something about that at some point.

      There isn't anything we could do to Mars that would end up affecting this planet. We've already made enough of a mess of it already.

      ~X~

      --
      ~X~
  33. A Little More Info... by Doesn't_Comment_Code · · Score: 3, Interesting

    Here's the kicker: the sea of block ice is only five degrees away from the Martian equator.

    I have to admit I don't know a lot about this yet... but why is it such a "kicker" that the ice is so near the equator?

    --

    Slashdot Syndrome: the sudden, extreme urge to correct someone in order to validate one's self.
    1. Re:A Little More Info... by misleb · · Score: 2, Insightful

      I guess it implies that it will be relatively easy to melt if we plan to warm the place up.

      -matthew

      --
      "THERE IS NO JUSTICE, THERE IS ONLY ME." -Death
    2. Re:A Little More Info... by Dan+East · · Score: 5, Informative

      I assume they said that because the article states that any water that close to the equator should have melted by now, unless it was covered by some insulating material such as volcanic ash.

      However there is an advantage to finding ice near the equator. If we wish to launch spacecraft from Mars the equator would be the best launching point, for the same reason we launch spacecraft from Earth as close to the equator as possible.

      The water could be a potential source of fuel, thus it (assuming it is water) lying close to the equator would be advantageous for that reason.

      Dan East

      --
      Better known as 318230.
  34. rough calculation of volume... by Vellmont · · Score: 3, Informative

    Mars isn't flat, and the area of the sea surely isn't square, but a very rough estimation of the volume would be: 800,000 meters * 900,000 meters * 45 meters = 32,400,000,000,000 cubic meters = 8,559,174,460,226,494 gallons or in words 8.6 quadrillion gallons or 32.4 quadrillion liters.

    --
    AccountKiller
    1. Re:rough calculation of volume... by Anonym1ty · · Score: 2, Funny
      32.4 quadrillion liters

      Is that the British Quadrillion or the American Quadrillion? - There is a difference.

      :P

  35. Re:wow by crymeph0 · · Score: 2, Insightful

    To say nothing of the mass hysteria that occurs when the words "life" and "mars" are randomly strung together in the same sentence, then repeated secondhand to an over-eager journalist.

    --
    It should be illegal to say that freedom of speech should be limited.
  36. What I find interesting was the tidbit by Bruha · · Score: 2, Interesting

    about the age of the ice pack. Estimated at 5 million years by crater impact aging. If Mars had water 5 million years ago on the surface then it may had a atmosphere then also. And if it had a atmosphere just as long as earth did until 5 million years ago then there could of been life on the planet and advanced life at that. We've seen microbes on ancient mars rocks so it's entirely possible there was life on mars but to what extent we cant see. Maybe storms or whatever stripped mars of it's atmosphere erased any visible signs from the surface such as vegetation.

    1. Re:What I find interesting was the tidbit by VelocityBoy09 · · Score: 3, Informative

      If Mars had water 5 million years ago on the surface then it may had a atmosphere then also

      It has an atmosphere now!
      http://mars.jpl.nasa.gov/facts/

      We've seen microbes on ancient mars rocks

      They saw structures inside the rocks that resembled bacteria, but they haven't found "microbes." They don't know for sure what they are.
      http://www.unmuseum.org/marsrock.htm

  37. Just frozen ice? by ehiris · · Score: 4, Interesting

    FTA: Images from the High Resolution Stereo Camera on Mars Express show raft-like ground structures - dubbed "plates" - that look similar to ice formations near Earth's poles, according to an international team of scientists.

    If it is indeed frozen H2O like in Antarctica, there is a possibility that it also contains liquid water within the ice. To the surprise of explorers, that was found in Antarctica.

    I tried to find a link to that information but I couldn't find anything good. My source is this Antarctica documentary

    I wonder what the temperature variation is on the Mars equator. Theoretically, how would that temperature variation affect a body of water of that size?

  38. Warmer near the Equator by Anonymous Coward · · Score: 3, Insightful

    1st it is warmer near the equator, so... so that would be a nicer place to live.

    2nd if it can exist near the equator, it might also be found in the colder areas.

  39. Waiter... by Doc+Ruby · · Score: 3, Interesting

    850m^2 * pi * 45m is 102,141,031m^3, which is 2.7E10 gallons. Ice is 107.5% the volume of its water mass, 2.5E10 gallons. Which is about 15-20% the size of only one of the NYC upstate reservoirs. Perhaps documenting the process by which this ice collected and buried will explain whether there was any other water, and where it went.

    --

    --
    make install -not war

    1. Re:Waiter... by Rick+Genter · · Score: 2, Informative

      Double-check your math. It's pi * r^2, not pi * d^2, and the sea is 800 to 900 kilometers in size, not 800 to 900 meters. So it's really

      (8.5*10^5 / 2)^2 * pi * 45

      or 2.55E+13 cubic meters

      or 6.74E+15 gallons.

      --
      Don't underestimate the power of The Source
    2. Re:Waiter... by Doc+Ruby · · Score: 3, Informative

      Well, there goes another snappy Slashdot post. 6.74E15 gallons is about 12% bigger than the capacity of all the Great Lakes. Since Mars has only about 28.4% Earth's surface area, that puts just this one reservoir in a league with a "Great Lakes" over 4x the size of ours. Now that is a lot of water, and maybe even a repository for Martian life.

      --

      --
      make install -not war

  40. And isn't known to be water by stewby18 · · Score: 4, Insightful

    Isn't the much more important mistake that they don't actually know that it's water?

    1. Re:And isn't known to be water by FleaPlus · · Score: 2, Informative

      It's just like the possible methane - people are letting their imaginations run *way* ahead of the evidence.

      Just a footnote: It turned out that this previous story regarding life on Mars turned out to just be shoddy journalism. The supposed "private meeting with space officials" was actually just a party. The researchers had no idea there was a reporter there, and the entire story was basically based on second-hand party gossip.

      More details here:

      http://www.badastronomy.com/phpBB/viewtopic.php?p= 418683#418683

      A statement from one of the supposedly-quoted researchers:

      A story has appeared in Space.com which quotes us
      inaccurately and without permission. The story is based on hearsay
      and is factually incorrect.

      Here are the facts:

      1. On Sunday night we were attending a private party
      of space exploration enthusiasts in which there was a
      discussion about the possible meaning of the results
      from recent Mars missions. We engaged in the
      discussion and expressed thoughts and opinions as
      individual scientists on our own time and did not
      represent ourselves as speaking for NASA.

      2. No one at the party identified themselves as a
      reporter, and in fact no reporters were present. This
      article is based on hearsay about what somebody at the
      party thought they heard us say. We think this
      represents extremely poor journalistic standards.

      3. No Nature paper has been submitted with Rio Tinto
      results. This claim is simply wrong and we did not
      make this claim. The MARTE project has several papers
      in preparation that describe the work we are doing at
      Rio Tinto and the first results of that work, but
      nothing has been submitted yet. Preliminary results
      have been published in abstract form at various
      scientific meetings. If you want to see what the MARTE
      team has actually said about results from Rio Tinto
      drilling and its relevance to life on Mars, go to
      www.marteproject.com and click on publications. All
      our REAL publications are posted there.

      4. The work at Rio Tinto is relevant to finding life
      in a subsurface terrestrial environment and can't be
      used to infer anything about life on Mars, directly.
      The Rio Tinto work by its very nature can't tell us if
      there is life on Mars, but certainly helps formulate
      the strategy for how to search for life on Mars. One
      approach to searching for extant life on Mars is by
      drilling. Partly for this reason, the MARTE project
      was selected for funding by NASA's ASTEP program, out
      of the Science Mission Directorate and is a joint
      project between NASA and Spain's Center for
      Astrobiology

  41. New Ice Hocky Team forming by davidwr · · Score: 2, Funny

    SPORTS ILLUSTRATED:

    A new hocky team is in town. Despite the ongoing lockout, the NHL has announced a new expansion franchise awarded to the Martian Terraformers.

    --
    Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
  42. Investigating this might not be that difficult... by tillerman35 · · Score: 2, Funny
    ... All we would need to do is have a probe drop a moderately sized man-made metorite or two onto the plate to expose the material underneath the "perhaps [only] a few centimetres thick" layer of volcanic ash.

    /Anyone know if the Brits are planning building Beagle 3?

  43. "maybe" "suggest" sort of kinda..... by Anonymous Coward · · Score: 3, Informative

    As exciting as the discovery is, The Slashdot summary reads like it's a done deal.

    Actually, the article linked starts out with this (note the word "may" in the 1st sentence):

    "A frozen sea, surviving as blocks of pack ice, may lie just beneath the surface of Mars, suggest observations from Europe's Mars Express spacecraft. The sea is just 5 north of the Martian equator and would be the first discovery of a large body of water beyond the planet's polar ice caps.

    Images from the High Resolution Stereo Camera on Mars Express show raft-like ground structures - dubbed "plates" - that look similar to ice formations near Earth's poles, according to an international team of scientists."

  44. Obligatory Atom and His Package quote by TANK+Ex+Mortis · · Score: 2, Funny

    "You're drunk with your tradition that has no validity I'm intoxicated with support for metrics come drink a decaliter with me we want metrics want want it now or we know we can't win I weigh 170 pounds that's 90 kilograms see metrics can even make you thin"

  45. Re:Quick let's dump keytones in it by ifwm · · Score: 2, Funny

    You know, your idiotic attempt to slam Bush would have been better if you spelles KETONES correctly.

    I mean, how can you be an anti-Bushie if you can't get your facts straight?

    Wait, that's the first requirement for anti-Bushie membership? Oops, sorry.

  46. spare us your sarcasm by idlake · · Score: 5, Insightful

    Everyone knows that nature is static, and how things were 50, 100, or 1000 years ago are the way that they should be today, tomorrow, and forever!

    The reason why large scale or long-term changes to the environment are so risky is not, as you mistakenly state, that nature is static. Rather, it is that nature is highly dynamic on time scales spanning millennia and we don't understand the dynamics yet. A significant change that we think produces benefits may, in the long term, have devastating consequences.

    Once we understand natural systems sufficiently well to be able to predict the consequences of our actions in the long term, then we can engage in deliberate planet-wide engineering efforts, here on earth on on Mars. Until then, anything that alters our atmosphere, oceans, or ecology significantly is Russian roulette.

    1. Re:spare us your sarcasm by metalogic · · Score: 2, Insightful

      Inaction is just another choice, not necessarily less risky. If we wait, we will just be playing another game of roulette: whether we can find another planet in time before Earth can no longer sustain us.

    2. Re:spare us your sarcasm by idlake · · Score: 2, Insightful

      Inaction is just another choice, not necessarily less risky

      Oh, it's a lot less risky. We know a lot about the earth's history without global human interference.

      If we wait, we will just be playing another game of roulette: whether we can find another planet in time before Earth can no longer sustain us.

      Based on what we know from biology, paleontology, and geology, we know that we can expect that Earth can sustain us for many millions of years to come if we don't mess up its ecology. After tinkering with its ecology, all bets are off.

    3. Re:spare us your sarcasm by idlake · · Score: 4, Insightful

      It implies that very bad things can happen, but how can you know, if so little of these matters are understood?

      Do you have to know how to land an airplane in order to figure out that the consequences of doing it wrong are bad?

      because I too fear playing around with the environment might cause destruction of a magnitude we cant even imagine. There seem to be some indications that this is possible, but I havent seen any proof yet. But until it's not disproven I's rather be safe.

      Actually, we do know some of the consequences. Numerous human civilizations have been wiped out by self-inflicted ecological disaster. We know how sea levels have varied over time. We know of species that have disappeared because they inflicted ecological disaster on themselves (of course, they couldn't reason about their own behavior). And there are indications that global weather patterns can be pushed into various fairly stable states, some of which are highly unfavorable to human life and civilization.

      So, we know all sorts of bad things can happen. We don't know what effects our actions will have, but we do know that current conditions are pretty good for us, so we should avoid doing things that might change them until we know what we are doing.

  47. Huh? by jsimon12 · · Score: 2, Interesting

    I thought they had deployed the radar boom and discovered the Ice, but it turns out these are theorized findings from visible light photos. And it appears NASA doesn't agree totally with this. WTF? Why do the Euro's argue with us on every damn Mars thing? I mean how many times have they been to the Red Planet, oh I forgot, this is like their first FREAKING time.

    When they deploy the MARSIS boom and verify this stuff, then I will crack the bubbly.

  48. Earth First! by wiredog · · Score: 3, Funny

    We can strip mine the rest later!

  49. I'm from Singapore! by ggvaidya · · Score: 2, Funny

    You forgot Newater, you insensitive clod!

  50. Therefore, it's a good idea to practise on Mars by Julian+Morrison · · Score: 2, Insightful

    ...since there's nothing there to get put out by any mistake, except dust, rocks, and wind.

  51. Good News by polyp2000 · · Score: 2, Informative

    The confirmation that a large body of frozen water exists on Mars is excellent news for any future manned missions to the planet. Its presence means that Human beings could sustain themselves for much longer periods of time without the need to transport gallons of water for use when they get there. With the addition of green houses it is even possible that water might be of vital use in growing food for consumption on the surface of Mars.

    --
    Electronic Music Made Using Linux http://soundcloud.com/polyp
  52. And according to user stats... by Engineer-Poet · · Score: 2, Funny

    any such program for agitated copious breathing which required a partner would never, ever happen as long as the people came from Slashdot. ;-)

  53. Re:NOT "discovered" by kronocide · · Score: 2, Informative

    "We still don't have the missing link that Darwin himself said you better find before you even start thinking about calling this theory fact."

    http://www.talkorigins.org/faqs/comdesc/section1.h tml#morphological_intermediates_ex3

  54. For crying out loud.... by bondjamesbond · · Score: 2, Insightful

    Would you please review your "Blue Collar Comedy" tape for the proper use of "Here's your sign"? You're supposed to have a sarcastic remark in counter to a stupid question. I'll bet your programs take FOREVER to correct for syntax... if you code, that is.

  55. Re:In Real Units by kronocide · · Score: 2, Interesting

    My point is that actual use of units doesn't involve paper--and it doesn't involve unit conversion.

    If it doesn't involve unit conversion, then your point about how much easier it is to cut a quart into cups is meaningless. No one unit is any better than any other, so the only way one of our systems can have an advantage over the other is in terms of unit conversion.

    If it did, units better amenable to conversion would have been derived a lot earlier.

    Decimal units had no advantages before there was agreement on a decimal, positional number system. The old units that were based on 12th, 16th, 24th, and 60th came about long before the Indian/Arabic system became standard in Europe. Yes, they are older, but that doesn't make them better any more than Roman numerals are better than Arab.

    It's just another Enlightenment flim-flam.

    Right. Like critical investigation, scientific method, human rights, and modern democracy!

    I hate to be rude, but bullshit.

    Your problem is not rudeness (I don't mind), it's that you're wrong. It's not "impossible" to eyeball a fifth, that's ridiculous. Why would it be? But more importantly, I know aproximately how much a deciliter is, just like you know aproximately how long an inch is, without having to take it out of a foot.