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Monday, October 13, 2008 |
Photo: Chimp "Stone Age" Finds Are Earliest Nonhuman Ape Tools, Study SaysThe 4,300-year-old tools push back chimpanzee tool-use thousands of years, and cast into doubt the long-standing theory that direct human ancestors were the only animals to independently develop stone tools. Photograph courtesy Gerald Newlands/ PNAS
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAYPhoto and Headline Widget
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