Human brains rounded into shape over 200,000 years or more

But scientists are still debating what caused changes in noggin form

digital brain reconstructions

ROUNDING OFF  Digital brain reconstructions compare a possible Homo sapiens from around 315,000 years ago (left) with a present-day human (right). Human brains didn’t attain the especially rounded shape observed today until sometime between 100,000 and 35,000 years ago, scientists say.

S. Neubauer, Philipp Gunz, MPI EVA Leipzig (CC-BY-SA 4.0)

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