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Until recently, thinking about human origins relied on the onset of a "cognitive revolution" at about 50,000 years ago that allowed the development of "modern humans." This revolution allowed modern humans to expand into previously unoccupied territory, or territory held by other ancient humans, and to eventually dominate in all geographic locations. However, archaeological evidence uncovered during the last two decades makes this theory less and less likely. Recent genetic advances show that Neanderthals and "modern hum...Log In or Sign Up to Read More