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Why are primates big-brained? Researchers' answer is food for thought

Brain size in Primates is predicted by diet, an analysis by a team of New York University anthropologists indicates. These results call into question "the social brain hypothesis," which has posited that humans and other primates are big-brained due to factors pertaining to sociality. Skulls of adult male spider monkey (Ateles paniscus; left) and howler monkey (Alouatta pigra; right). Skull collection: Center for the Study of Human...

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Why are primates big-brained? Researchers' answer is food for thought

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