“When our ancestors discovered the trick of consistently producing sharp stone flakes, it constituted a major breakthrough in human prehistory. …The modest flake… is a highly effective implement for cutting through all but the toughest of hides… the humans who made and used these simple stone flakes thereby availed themselves of a new energy source—animal protein.”

The Origin of Humankind (1994)

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Richard Leakey 39
Kenyan paleoanthropologist, conservationist, and politician 1944

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