Slashdot Mirror


Interstellar Dust Could Be "Alive"

reezle writes "An international team has discovered that, under the right conditions, particles of inorganic dust can become organized into helical structures. These structures can interact with one another in ways that are usually associated with organic compounds and with life. Not only do these helical strands interact in a counterintuitive way in which like can attract like, but they also undergo changes that are normally associated with biological molecules, such as DNA and proteins, say the researchers. For example, they can divide to form two copies of the original structure. These new structures can also interact to induce changes in their neighbors. And they can even evolve into yet more structures as less stable ones break down, leaving behind only the fittest structures in the plasma. 'These complex, self-organized plasma structures exhibit all the necessary properties to qualify them as candidates for inorganic living matter,' said the lead researcher. 'They are autonomous, they reproduce and they evolve.'" The research, published in the New Journal of Physics, was carried out using a computer model of molecular dynamics.

13 of 332 comments (clear)

  1. Organic does not mean "alive" by andy314159pi · · Score: 4, Interesting

    Organic doesn't mean biological! Organic chemistry, which is the bread and butter of modern chemistry, really has very little to do with life. It's the science of synthesizing new molecules which use carbon as its framework (as well as oxygen, nitrogen and other elements.) So things that are alive are always organic, but things that are organic are not always alive!

  2. It's living *plasma*, not living dust! by Dr.+Spork · · Score: 2, Interesting
    Wow, that was some misleading writing, though some very interesting research. I wonder if there's a practical way to observe actual plasma on this level, to see whether the simulation mirrors actual plasma physics. Also I wonder if there is an upper limit on the size, complexity and longetivity of plasma structures. It's hard to imagine something that hot would be very stable, though I'm prepared to be surprised.

    I'm pretty skeptical though. If evolving structures are so common that we see them even in a low-powered simulation, and every single star has so much freaking plasma, where are our plasma overlords? Or maybe that's hell, and those structures are just ... the souls of the damned! Oooh!

  3. Re:Simulated inorganic life .... by inviolet · · Score: 1, Interesting

    I've often wondered something like this. If we ever have a computer powerful enough to fully simulate a human brain, would, would the simulation qualify as human?

    And thus would begin its n-hundred year struggle for political recognition of its sovereignty. And it would be the sort of struggle that simply requires a long time interval, in which members of the obsolete worldview die of old age. The human mind congeals around age 30, so that means that all serious ideological upheavals require everyone over 30 to die off.

    In any case, I've always thought that the only prerequisite for having one's political rights recognized, is the act of demanding exactly that.

    --
    FATMOUSE + YOU = FATMOUSE
  4. Re:Simulated inorganic life .... by fyngyrz · · Score: 4, Interesting
    If we ever have a computer powerful enough to fully simulate a human brain, would, would the simulation qualify as human?

    In reality, yes, of course. Legally and socially are other matters entirely.

    Additional implied consequences include that given the ability to simulate a human brain in real time, the usual incremental hardware improvements will allow simulation in better than real time, leading naturally and directly to more-than-human performance. Likewise, lesser hardware could perform fully human reasoning in less than real time, which could put slow, but still intelligent, human reasoning and other attributes into play. This is entirely aside from the issue of improving the human model, which is also a very likely path of advancement given the initial achievement.

    --
    I've fallen off your lawn, and I can't get up.
  5. Re:You hit the nail on the head. by Gospodin · · Score: 4, Interesting

    So, taking your argument one step further and combining with the parent post, you think it's likely that 12-foot flightless birds exist somewhere else in the universe?

    --
    ...following the principles of Heisenburger's Uncertain Cat...
  6. Re:Simulated inorganic life .... by isomeme · · Score: 5, Interesting

    I believe it was Roger Schank who was once asked "Do you think computers will ever be as intelligent as humans?" and replied "Yes. Briefly."

    --
    When all you have is a hammer, everything looks like a skull.
  7. Re:The actual article by mopomi · · Score: 2, Interesting

    I agree that the statements, if true do not necessarily imply divine construction.

    My point was that (and I should have stated it more clearly) we don't know how long complex, living structures take to evolve. Therefore, the argument that the complexity of living creatures is too high to have evolved on the earth from non-living structures is specious.

    Additionally, the argument that the age of the universe is insufficient for panspermia to act over large distances doesn't make any sense:

    Fact: Our Milkyway Galaxy is ~100,000 light years in diameter.
    Fact: 1 lightyear is ~ 10^13 km
    Fact: The solar system moves at roughly 250 km/s relative to the center of our galaxy.

    So, assume life was created on the other side of the galaxy. Also assume its carrier is moving at 125 km/s directly toward the sun (ignore rotation for this).

    It would have to travel 10^18 km. 10^18 km / 125 km/s = 8*10^15 s = 253,510,117 years.

    That's nothing compared with the age of the solar system (~4.5 x 10^9 years) to say nothing of the age of the galaxy or of the universe. Panspermia is a fine theory as far as time and distance is concerned. As you point out, comets could easily incubate/shelter life for long periods of time (and 253 million years isn't that long). It's easy to imagine that life on Earth originated from across the galaxy...

    So, to my point: when making such a grand claim in a scientific article, one needs to either present the work that supports the claim in the article or cite previous articles that have been peer-reviewed and published. Simply stating it as fact is pseudoscience at its worst.

  8. Re:Simulated inorganic life .... by tukkayoot · · Score: 2, Interesting

    There was some interesting debate about this some years ago in Penrose's "The Emperors New Mind" and other articles from Douglas Hofstadter. Computers are rule based. We can convert all those electronic rules to flowcharts on paper. This in turn can be converted to a book. A really big book to be sure, but a book nonetheless. Now imagine if the software that mimiced a human mind were converted to a physical, dead-tree book... Would the book be "conscious" if someone turned the pages depending on the outcome of the rules?

    No, the book would not be conscious because a book is a static object incapable of following the rules contained within.

    You could write a book on how a microprocessor works, but it wouldn't possess the qualities we think of as inherent to a functioning microprocessor, like the ability to perform calculations.

    Likewise, you could write a book with all of the "rules" of consciousness, but the book itself would not be conscious.

    If you had a computer that could put all of the rules of consciousness into practice, then you'd have a conscious computer.
  9. Mods under 30 by Harmonious+Botch · · Score: 1, Interesting
    Wow, mods are touchy today.

    The human mind congeals around age 30 I've talked over that very subject with several friends, and it appears to be true. As one of them said, "When I was 20, I looked back on what I had believed when I was 15, and it was stupid. When I was 25, I looked back on what I had believed when I had been 15 and when I had been 20. Same thing. When I was 30, I had changed some more, and I looked back on what I had believed when I had been 15, 20, and 25, and it was all crap. When I was 35, I looked back on what I believed when I was 30, and I still pretty much agreed with it."
    1. Re:Mods under 30 by fractoid · · Score: 1, Interesting

      I've talked over that very subject with several friends, and it appears to be true. As one of them said, "When I was 20, I looked back on what I had believed when I was 15, and it was stupid. When I was 25, I looked back on what I had believed when I had been 15 and when I had been 20. Same thing. When I was 30, I had changed some more, and I looked back on what I had believed when I had been 15, 20, and 25, and it was all crap. When I was 35, I looked back on what I believed when I was 30, and I still pretty much agreed with it." That's funny. I'm 25, and when I look back on what I believed when I was 15, and when I was 20, I don't think I was stupid then and I'm magically smarter now. Most of it, I still agree with - the important bits, anyway, the principles. Where I was wrong, it was due to incomplete or incorrect information (inexperience, naivety are both just lack of data). I don't doubt that when I'm 30 I'll have further refined my world view and I'll disagree with some points I currently believe, but I'll still know how I came to those conclusions, and agree that in the same situation I'd do the same again. Maybe I was exceptionally mature at 15 (I always got on better with adults than with the half-formed animals that called themselves my peers) or maybe I'm exceptionally immature now (as I've been told plenty of times by bland grey people who honestly believe that 'having fun' is 'something that only kids do').

      Personally I can't understand people who think they're fundamentally different people than they were when they were younger. Give me the same ethical question now and when I was 15, and I'm likely to answer the same - are you saying you wouldn't? That you've become a hugely better person in that time? That you've become smarter? Obviously you'd know more, but knowledge is not wisdom.
      --
      Rampant carbon sequestration destroyed the Dinosaurs' tropical paradise. I'm here to help repair the damage.
  10. Re:You hit the nail on the head. by Hal_Porter · · Score: 2, Interesting

    I don't think that's really important. There's a deep problem with the origin of life, since the current DNA and protein based life is far to sophisticated to be the original. So there's a fair chance that it's not the first generation and it has simpler precursors.

    Graham Cairns Smith talked about clay based life as essentially making organic molecules as tools which eventually took over. It's a poetic idea, particularly Richard Dawkins comment that our silicon based tools make eventually take on a life of their own and complete the cycle from Silicon to Carbon and back to Silicon based life. But I don't think the clay based life is really plausible - it's just too inflexible. But my guess is that there are earlier generations of 'life' out there. I use the quotes because they would would be hard to spot as life since they are far closer to boundary between complex chemistry and simple life.

    And any research that discovers/invents alternative architectures for life may tell how they could possibly work.

    --
    echo -e 'global _start\n _start:\n mov eax, 2\n int 80h\n jmp _start' > a.asm; nasm a.asm -f elf; ld a.o -o a;
  11. The ageless universe by eimikion · · Score: 2, Interesting

    the age of the Universe is also not sufficient for organic life to be created in a distant environment. What if the universe has no beginning? We can only say something about observable, local structures of cosmos. In the eternal universe, where panspermia is a regular phenomenon, you have all the time you need. Also there is a problem with complexity: without any other self-organizing structures to compare it is at least problematic to declare living creatures "complex". Maybe somewhere in the universe are structures with greater level of complexity?
  12. Agrees with Genesis? by ThaReetLad · · Score: 2, Interesting

    Genesis 2:7 the LORD God formed the man from the dust of the ground.

    --
    You can't win Darth. If you mod me down, I shall become more powerful than you could possibly imagine