“If the molecular evidence is correct… almost five million years passed between the time our ancestors became bipedal and the time when they started making stone tools. Whatever the evolutionary force that produced a bipedal ape, it was not linked with the ability to make and use tools. However, many anthropologists believe that the advent of technology 2.5 million years ago did coincide with the beginnings of brain expansion.”

— Richard Leakey

The Origin of Humankind (1994)

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Richard Leakey 39

Kenyan paleoanthropologist, conservationist, and politician 1944

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