Early Humans' Weapon-Making Skills Sharper Than Expected

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A delicate, sophisticated way to craft sharp weapons from stone apparently was developed by humans more than 50,000 years sooner than had been thought.

The finding could shed light on what knowledge people were armed with when they started migrating out of Africa.

The artful technique is known as pressure flaking. Early weapons' makers typically would use hard blows from a stone hammer to give another stone a rough blade-like shape, then would use wood or bone implements to carve out relatively small flakes, refining the blade's edge and tip....

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