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The research is published today in the online early edition of the journal Proceedings of the National Academy of Sciences.
"Twenty years ago, this would have been heretical; finding evidence of life 3.8 billion years ago was shocking," said Mark Harrison, co-author of the research and a professor of geochemistry at UCLA.
"Life on Earth may have started almost instantaneously," added Harrison, a member of the National Academy of Sciences. "With the right ingredients, life seems to form very quickly."
The new research suggests that life existed prior to the massive bombardment of the inner solar system that formed the moon's large craters 3.9 billion years ago.
"If all life on Earth died during this bombardment, which some scientists have argued, then life must have restarted quickly," said Patrick Boehnke, a co-author of the research and a graduate student in Harrison's laboratory.
Scientists had long believed the Earth was dry and desolate during that time period. Harrison's research -- including a 2008 study in Nature he co-authored with Craig Manning, a professor of geology and geochemistry at UCLA, and former UCLA graduate student Michelle Hopkins -- is proving otherwise.
"The early Earth certainly wasn't a hellish, dry, boiling planet; we see absolutely no evidence for that," Harrison said. "The planet was probably much more like it is today than previously thought."
originally posted by: Teikiatsu
So do they now need something besides the primordial soup and lightning bolts, or tidal pools and lipids? Or will the meteor seeds gain more momentum?
originally posted by: bjarneorn
originally posted by: tothetenthpower
a reply to: Cobaltic1978
That's our hypothesis, but water isn't a 100% requirement.
As someone else stated here, the big shocking news is ... you're still 100% wrong, on all accounts.