Scientists Are Amazed By Stone Age Tools They Dug Up In Kenya

Scientists Are Amazed By Stone Age Tools They Dug Up In Kenya  NPR Did climate change help modern humans emerge?  NBCNews.com Colored Pigments and Complex Tools Suggest Humans Were Trading 100000 Years Earlier Than Previously Believed  Smithsonian Rick Potts | The Smithsonian Institution's Human Origins Program  Smithsonian's Human Origins - Smithsonian Institution Radical Revision To Timeline Of Human Behavior Evolution  Discover Magazine (blog)Full coverage

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