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DNA stable during atmospheric transit and re-entry

  1. Nov 26, 2014 #1
    DNA survives critical entry into Earth's atmosphere
    http://www.sciencedaily.com/releases/2014/11/141126144150.htm

    Full published article:
    http://www.plosone.org/article/fetc....1371/journal.pone.0112979&representation=PDF
     
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  3. Nov 26, 2014 #2

    Ygggdrasil

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  4. Dec 2, 2014 #3

    Ouabache

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    So now these researchers have shown this to be the case, we may ponder the next logical question, is this how life orginaly arrived on earth and populated our ancient oceans? hmmmm :oldeyes:
     
  5. Dec 2, 2014 #4
    Or is life on earth the original seed for life on other planets throughout the universe? That would be a pretty major long-shot. But life on Earth is ~ 3.8 billion years old. I wonder if some of the DNA from Earth past, hasn't reached some distant planet favourable to life?
     
    Last edited: Dec 2, 2014
  6. Dec 2, 2014 #5

    Danger

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    Other than possibly the dinosaur-extinction asteroid impact, I doubt that any event in Earth's history has been traumatic enough to eject such material into space in amounts large enough to have encountered any physical bodies. What little might have escaped is probably either still floating around or has been sucked into the sun.
     
  7. Dec 3, 2014 #6
    A rather large step to get from DNA to life.
     
  8. Dec 3, 2014 #7
    Here is a piece discussing some of these possibilities:
    Natural Transfer of Viable Microbes in Space from Planets in the Extra-Solar Systems to a Planet in our Solar System and Vice-Versa
    http://arxiv.org/ftp/arxiv/papers/0809/0809.0378.pdf
     
  9. Dec 3, 2014 #8

    Pythagorean

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    You can't be too sure. It's possible that it was the other way around: that it was a rather large step for life to get something as stable as DNA to depend on - previous to that, it could have been an "RNA world"

    http://www.ncbi.nlm.nih.gov/books/NBK26876/
     
  10. Dec 3, 2014 #9

    Danger

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    :bugeye:
    The entire CSI franchise would never have existed!
     
  11. Dec 3, 2014 #10

    Pythagorean

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    I should clarify - I meant it may be the case that DNA evolved from an RNA world.
     
  12. Dec 3, 2014 #11

    Danger

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    Oh, okay. I've always thought that it came about that way. I guess that maybe I took an idle speculation as fact when I was a kid, and never realized that it wasn't established.
     
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