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Sleep - July 2007Why do we need sleep? Part of the answer may be to strengthen memories.
First Primates - July 2008Our most distant primate ancestors, which took the stage shortly after the dinosaurs left it, were tree-dwellers the size of mice.
Earthquakes in the Midwest - Sep. 2009Three massive earthquakes struck the American Midwest in 1811-12. Could it happen again?
Profile: Sang-Mook Lee - Sep. 2009A South Korean geophysicist paralyzed from the neck down defies stereotypes of the disabled.
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