what does the out of africa theory maintain
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If you look hard enough, you'll find any number of theories about just where human beings originated -- and who knows? Maybe we really were banished from a Mesopotamian Garden of Eden, or we really did stumble out of a crashed spaceship. The prevailing theory among scientists, however, is that the first Homo sapiens evolved in Africa and, between 56,000 and 200,000 years ago, migrated into other lands.
Some anthropologists actually refer to this theory as the out of Africa II theory, as it involves a previous African exodus by tribes of Homo erectus, followed by the scattering of H. sapiens that eventually became human civilization. This wave of migration steadily washed over the entire world for tens of thousands of years. The pockets of primitive hominids, such as Neanderthals, eventually disappeared. Perhaps they weren't able to compete with H. sapiens for limited resources or weren't as capable of adapting to survive the constant rigors of a prehistoric Earth. To learn more, read How Human Migration Works.
Some anthropologists actually refer to this theory as the out of Africa II theory, as it involves a previous African exodus by tribes of Homo erectus, followed by the scattering of H. sapiens that eventually became human civilization. This wave of migration steadily washed over the entire world for tens of thousands of years. The pockets of primitive hominids, such as Neanderthals, eventually disappeared. Perhaps they weren't able to compete with H. sapiens for limited resources or weren't as capable of adapting to survive the constant rigors of a prehistoric Earth. To learn more, read How Human Migration Works.
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Summary: New research confirms the "Out Of Africa" hypothesis that all modern humans stem from a single group of Homo sapiens who emigrated from Africa 2,000 generations ago and spread throughout Eurasia over thousands of years.
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