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From the Complexity Digest:
>"Cosmic fallout from an exploding star dusted the Earth about 2.8
million years ago, and may have triggered a change in climate that affected the
course of human evolution. The evidence comes from an unusual form of iron that
was
blasted through space by a supernova before eventually settling into the rocky crust beneath the Pacific Ocean."< A weird idea: could the C-13 weird isotop also be such a 'guest'? There are
so many things we don't know (except for biology, where we know'em all
<G>)
John M
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