Neanderthals didn't give us red hair but they certainly changed the way we sleep
October 6, 2017 by Darren Curnoe, The Conversation
Geneticists have now firmly established that roughly two percent of the DNA of all living non-African people comes from our Neanderthal cousins.
It's difficult to imagine why our early ancestors would have mated with them. Neanderthals were a different species to us after all, and the thought of it seems distasteful to us today.
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https://phys.org/news/2017-10-neanderthals-didnt-red-hair.html#jCp
