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"With surprising and mysterious regularity, life on Earth has flourished and vanished in cycles of mass extinction every 62 million years, say two UC Berkeley scientists who discovered the pattern after a painstaking computer study of fossil records going back for more than 500 million years."
sfgate.com/cgi-bin/article.cgi
See also:
divedi.blogspot.com/2005/03/...lion.html
sfgate.com/cgi-bin/article.cgi
See also:
divedi.blogspot.com/2005/03/...lion.html
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