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Scientists confirm 3.5 billion
JAY GORY, MANAGING EDITOR, science
It took more than 10 years of painstaking work, grinding an Australian rock containing fossils smaller than the eye could see, to confirm the earliest direct evidence of life on Earth, scientists said Monday. The 3.5-billion-year-old fossils -- many narrower than a human hair -- are described in the Proceedings of the National Academy of Sciences, a peer-reviewed US journal. "None of these studies are regarded as proof of life," lead author John Valley, professor of geoscience at the University of Wisconsin-Madison, told AFP. read more


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