Neanderthals leave their mark on us

Neanderthals shared a common ancestor with humans about 600,000 years ago, and didn’t go extinct until 30,000 years ago.  Scientists have been able to reconstruct most of the Neanderthal genome using fossil fragments, and found that humans must have interbred with them in the past, since some DNA is similar between Neanderthals and modern-day Europeans …

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