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Ques. about AMH migrations: horn vs. nile-valley
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[QUOTE]Originally posted by Amun-Ra The Ultimate: [QB] Here's for you Asar Imhotep a study (from Nature) about the Khoisan which discuss a bit what I said earlier: [b]Khoisan hunter-gatherers have been the largest population throughout most of modern-human demographic history[/b] Abstract The Khoisan people from Southern Africa maintained ancient lifestyles as hunter-gatherers or pastoralists up to modern times, though little else is known about their early history. Here we infer early demographic histories of modern humans [b]using whole-genome sequences[/b] of five Khoisan individuals and one Bantu speaker. Comparison with a 420 K SNP data set from worldwide individuals demonstrates that two of the Khoisan genomes from the Ju/’hoansi population contain exclusive Khoisan ancestry. Coalescent analysis shows that the [b]Khoisan and their ancestors have been the largest populations since their split with the non-Khoisan population ~100–150 kyr ago[/b] . In contrast, [b]the ancestors of the non-Khoisan groups, including Bantu-speakers and non-Africans, experienced population declines after the split[/b] and lost more than half of their genetic diversity. Paleoclimate records indicate that the precipitation in southern Africa increased ~80–100 kyr ago while west-central Africa became drier. We hypothesize that these climate differences might be related to the divergent-ancient histories among human populations [URL=http://www.nature.com/ncomms/2014/141204/ncomms6692/full/ncomms6692.html]www.nature.com/ncomms/2014/141204/ncomms6692/full/ncomms6692.html[/URL] [/QB][/QUOTE]
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