The large visual region in a Neanderthal's brain may have compensated for low levels of light, but left little room for social cognition to develop, according to a study published in the journal Proceedings of the Royal Society B. The lack of social cognition meant the Neanderthal could not adapt to environmental change. Although the brain size for Neanderthals is the same as for modern humans, a smaller social cognition meant a weak social and cultural network, which prevented the Neanderthals from getting the resources needed to survive.

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