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Defying thousands of years of conventional wisdom, scientists are reporting that it is possible for
During drought years on the Galapagos, small, easily eaten seeds become rare, le
Earth’s history spans 4.5 billion years. Geologists and paleontologists have pieced together the his
(a) The site of Zhoukoudian outside of Beijing, China, spans several hundred thousand years and (b)
The Upper Cave at Zhoukoudian yields ages of about 25,000 years for Homo sapiens.
Structure of the E. coli Tus protein, complexed with double-stranded DNA