is there some sort of cutoff point where scientists decided “everyone in Ireland 100,000 years ago will be considered 100% Irish”?
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The “out of Africa” hypothesis is being somewhat challenged, although challenged is probably too strong a word really we could say it’s being modified and tweaked.
It’s now clear there were breeding events with devisonians and Neanderthals who evolved from homo erectus outside of Africa. I guess you could point to the fact Homo erectus itself evolved in Africa before spreading out but these distinct human species didn’t evolve in Africa.
They contribute a small but important % of human dna so while *most* of our DNA originated in Africa an important part of it does not since this comes from non-African devisonians and Neanderthals.
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