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A draft sequence of the Neanderthal genome was published, demonstrating that today's humans have Neanderthal ancestors.

Historical image related to A draft sequence of the Neanderthal genome was published, demonstrating that today's humans have Neanderthal ancestors. from May 7, 2010

Neanderthal

Extinct Eurasian species or subspecies of archaic humans

Neanderthals are an extinct group of archaic humans who inhabited Europe and Western and Central Asia during the Middle to Late Pleistocene. Neanderthal extinction occurred roughly 40,000 years ago with the immigration of modern humans (Cro-Magnons), but Neanderthals in…
Source: Wikipedia (CC BY-SA)

Interbreeding between archaic and modern humans

Evidence of human hybridization during the Paleolithic

Interbreeding between archaic and modern humans occurred during the Middle Paleolithic and early Upper Paleolithic. The interbreeding happened in several independent events that included Neanderthals and Denisovans, as well as several unidentified hominins.
Source: Wikipedia (CC BY-SA)