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Modern humans (left) have brains that are more than three times larger than our closest living relatives, chimpanzees (right)

Brain size of human ancestors evolved gradually over 3 million years

February 22, 2018

A study by Bernard Wood, professor of human origins at the GW Center for the Advanced Study of Human Paleobiology, and a team of Columbian College alumni showed that the average brain size of human ancestors increased gradually over 3 million years, growing to more than three times larger than our closest living relatives.