What Made Us “Human” Sliced Meat 1.8 mm yrs Ago

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By 1.8 million years ago, Homo erectus sliced up raw meat with stone tools before eating it…It was a momentous move, making it possible to consume more calories while reducing chewing effort…Faces and jaws got smaller while an energy-rich diet allowed brains and bodies to enlarge…Evolutionary shrinkage of bones and muscles involved in chewing affected other parts of the body, …An expanded vocal tract boosted the ability to make speech sounds. And a repositioned spinal cord, resulting from realignment of the base of the skull, increased the ability to walk and run long distances. Continue reading

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