Humans Developed More Feminine Faces When They Started Using Tools

August 2, 2014 4:49 AM

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Researchers believed a technology boom 50,000 years ago is linked with a reduction of testosterone that occurred in humans around the same time.

The researchers observed a change in the human skull that occurred around the same time we started making tools, Duke University reported. The study was published on Aug. 1 in the journal Current Anthropology.

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