Crania are Ordered (from Front to Back) from Least Variable within Species to Most (IMAGE)

Proceedings of the National Academy of Sciences

Crania are Ordered (from Front to Back) from Least Variable within Species to Most

Caption

Crania are ordered (from front to back) from least variable within species to most: Bonobos, Chimpanzees, Humans, Siamangs, Gorillas, Bornean Orangutans and Sumatran Orangutans.

Credit

Image courtesy of Roderick Mickens/AMNH.

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