ANTH 1105 Chapter 4: Ch4Notes - anatomically modern humans
3 Mar 2017
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2 hypothesis of how anatomically modern humans emerged: multiregional model; human populations throughout old world evolved independently, first to archaic h. sapiens, then to fully modern humans. Multiple origins of h. sapiens and no migrations later than those of homo erectus. Modern geographic populations have been separated for 2my. Until recently, the multiregional model was heavily favored. Mitochondrial dna used to look at mutation rates: only inherited through maternal line. Biologists concluded that all modern humans derived from a 200 000 year old african population from which populations migrated to the rest of the old world. All of dna analysis returns back to a sole population in africa that migrated to asia/europe, split and migrated continuously. Likely originated in savanna areas of africa: constant environmental changes between warm/cold ice age. There is disagreement on multiple migrations or one migration out of africa. Different tools, animal corpses and shellfishfound between 80-60 thousand years ago.
