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The skeleton of Ardipithecus ramidus, an ancient fossil dubbed "Ardi," is radically changing our ideas about mankind's origins. Kent State University's C. Owen Lovejoy says Ardi shows our ancestors were more like us and less like chimps. WSJ's Robert Lee Hotz reports.
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http://online.wsj.com/article/SB10001424052748704471504574449012560741086.html