Tabitha M. Powledge reviews commentary on the latest research into the traces of Neandertal genetic material — and to a lesser extent, genes from Denisovans — that most modern humans carry within them as a result of ancient cross-breeding: "The others are gone. Vanished. Extinct for thousands of years. But some live on in our DNA as a result of all those matings. Everybody outside of Africa has Neandertals in their family trees, ranging from 1.5 to about 4% of DNA."
March 26, 2016
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