Are the aliens already here? (LINK)
November 29th 2007 09:16
In this fascinating article in Scientific American, the physicist and cosmologist Paul Davies - who has a keen interest in exobiology - talks about the prospects and issues pertaining to the search for alien life right here on Earth. Such life is likely to be microbial, and would be detected by finding some key feature that would at the very least give us reason to suspect that the life form had a separate origin of life and evolved independently from the bacteria, archaea and eukaryota (the three "domains" of life on Earth).
Here's an excerpt
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Here's an excerpt
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