Wednesday, August 8, 2007

Ancient microbes

BBC News has an article on a scientific discovery of microbes, that are estimated to range in age from 100,000 to 8 million years of age, from melted samples of Antarctic ice. What I found interesting about the find is in the following quote:

The team suggests that because DNA in the old ice samples had degraded so much in response to exposure to cosmic radiation, life on Earth is unlikely to have hitched a ride on a comet or on debris from outside the Solar System - as some scientists have suggested. "Given the extremely high cosmic radiation flux in space, our results suggest it is highly unlikely that life on Earth could have been seeded by genetic material external to this Solar System," they wrote in
their scientific paper.
Therfore this discovery gives evidence towards life being created directly on earth, not drifting from other planets, galaxies or universes.

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