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Two theories are discussedfor the descendancy of modern humans: the Out Of Africa (OOA) and the Multiregionalism (MRT) theories. Both theories describe modern humans to relate back to common ancestors that came from Africa. However, the MRT assumes the Most recent common ancestor (MRCA) to have left Africa some 2 MYa. The OOA locates the MRCA in Africa much more recently at about 0.2 MYa (200,000 ya).
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