Human Ancestors May Have Used Tools Half-Million Years Earlier Than Thought

January 22, 2015 11:05 PM

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Human Ancestors May Have Used Tools Half-Million Years Earlier Than Thought

Fossil hand bones show evidence of tool use more than three million years ago.

Who swung the first hammer stone? Early human ancestors may have hefted tools more than three million years ago, ancient hand bones suggest. That’s roughly half a million years earlier than the oldest stone tools yet discovered.

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