Comments by "bakters" (@bakters) on "New Scientific Discovery Challenges Established Human Evolutionary Theory" video.

I still can't understand why Africans have so little Neanderthal admixture. They got the first batch from 220K BP, but not the second one from 130K BP? If so, that would mean that all non-African people come from those late Siberian hybrids? Can we somehow marry those two theories, because none of them seem to be perfect.
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@jasonborn867 Yeah, that makes more sense to me. In the meantime, I watched several fairly recent lectures on this topic, and the arguments advanced there seemed to have less holes overall. With the genetics being the strongest argument for Out of Africa, it seems. The genetic diversity alone is a problem for Out of Eurasia, am I correct? Because if H. sapiens evolved there, we should expect a bottleneck event during late migration into Africa, so African genetic diversity predicted by this model should be lower than that of Eurasia, and it just isn't. " My comment analyzes flaws in the paper he cites if interested " I've found it. It's interesting.
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@HighlyCompelling " "they assumed Africans had zero Neanderthal DNA* " They didn't assume that, as far as I remember. And it was all about 'higher' or 'lower' correlation between the sampled genes, nothing about "zero" per se. Still, Africans have about two orders of magnitude less Neanderthal DNA, and it's also possible that some of it is actually a Sapiens' admixture into the Neanderthals. That's what the lecture you have linked suggests. I mean, we can see recent European admixture in Africa. Why nothing earlier than that? " This study goes into the genetics of Yoruba and Bushmen " Thank you very much, it's a very interesting paper. However, it confirms that Africans are the most genetically diverse people, and among them the hunter-gatherers are the most genetically diverse. If Sapiens emerged in Eurasia, then went into Africa, we would expect low genetic diversity as we see among Amerindians. It's exactly the other way around, though. That's a big problem for Out of Eurasia hypothesis, since it predicts a very different result. Additionally, I don't see how Neanderthals and Denisovans suggest that Sapiens should have evolved in the same area? It surely couldn't, since we are different than them, most likely because of different selective pressures. So it was a different area.
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