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As is usually the case, reality is to messy for simple explanations like this to be completely correct. Europe and Africa are pretty close, so there has been a lot of migration to and fro, some of it bringing Neanderthal DNA into Africa: https://www.sciencemag.org/news/2020/01/africans-carry-surpr...

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From the quoted article:

- "modern Europeans and East Asians apparently inherited about 2% of their DNA from Neanderthals"

- "African individuals on average had [...] more Neanderthal DNA than previously thought—about [...] 0.3% of their genome."

So the article seems to confirm a 10x difference in Neanderthals DNA, which might be significant. It's also unclear what they mean by "Africans, did the same include, e.g. Egyptians of Greek descent?

Fascinating revelation. What still puzzles me is how Asian populations have a slightly higher average proportion of Neanderthal DNA when their range was predominantly over the European part of Eurasia.

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