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Ancient humans’ teeth show they were predominately right-handed

A study of the teeth of an ancestor of the Neanderthals shows that ancient humans were predominantly right-handed.

The researcher surmises that ancient humans probably used their teeth like a third hand, clenching onto meat and other objects to cut them with stone tools.

In the process, she adds, ancient humans might have grazed their incisors, creating diagonal marks.

Mosquera says that to ensure the safety of their noses, ancient humans probably moved their blade in a downward motion, causing right-handers to make tooth marks in one direction, left-handers in another.

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