I proposed this as a non-joke explanation a while back. Thread incoming 1/xhttps://twitter.com/mtpollack/status/1275074760070684676 …
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That makes sense. I dont know anything about how prehistoric populations would migrate. My main concern was the continent terminology given that africa has within it greater genetic variability than all humans outside of africa for instance.
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Africa has all kinds of genetic variation because the species of human there has a longer history there - it doesn't have more phenotypic variation
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