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Fire engineers of the Stone Age

People in southern Africa 72,000 years ago heated stones in preparation for toolmaking

3:48pm, August 13, 2009

Stone Age toolmakers didn’t need motivational speakers to get fired up at work. People living on the southern tip of Africa 72,000 years ago decided on their own to heat stones with carefully controlled fires in order to make the rock more suitable for tool manufacturing, a new study finds.

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