Dictionary of Human Evolution and Biology

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Single Species Hypothesis

Theory that there has never been more than one Plio-Pleistocene hominid lineage at any given time because all hominids are characterized by culture and thus occupy the same ecological niche; popularized in the 1960s by Brace and Wolpoff and at that time held to be true by many paleontologists; later fossil discoveries proved the untenability of this idea.

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