What happens when you replace a human gene with its Neanderthal version? – Ars Technica

Enlarge/ The difference between modern human (left) and Neanderthal skulls means there must be some differences in how their brains develop.
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What are the key differences between modern humans and our closest relatives, the Neanderthals and Denisovans? For the Neanderthals, there doesn’t look to be any sort of obvious difference. They used sophisticated tools, made art, and established themselves in some very harsh environments. But, as far as we can tell, their overall…

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