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The various faces of Africans: East to West & visa versa
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[QUOTE]Originally posted by jluis: [QB] [QUOTE]Originally posted by ausar: [B]jluis, are you aware ...the forest areas of Western Africa... ...the Central Saharan area... ...the Sahara fertile... Well, to start with the msg, I have to say that this kind of exchange is much more interesting and fruitful than the exchange of insults over long-time deceased racist theories. It is even better that the use of greco-roman quotations as flying weapons against the other. About the case: I am aware that modern W Africans did not originate in the forest belt but came from the North. I think nobody disputes this is linked to the final desertization of Sahra. But I'd really like to know where is the maximum genetic diversity in Africa. Ausar's post seems to reflect the opinion that it was in the Sahel. Broadly speaking, somewhere between lake Chad and the Nile. I do not agree and so present an alternative: The most diverse point of Africa and so the point of origin of most of the current African people (and to anyone else, but OK. Let's focus in Africa) is East Africa. The line of mountains and lakes that cross E Africa from Ethiopia in the North to the Drakensbers in South Africa. This is the point or origin of most African. I refer here to the period of the last 20,000 years or so, not to the overall history of human kind. From this mountain environment, people expand to the rest of Africa. The Great Lakes area and the Nile Basin is a clear gate for expansion and that explains the diversity we see now. But this diversity is secondary. The oldest diversity is somewhere in the Rift Valley or even further South. Maybe the genetic experts in this forum can add some light to this contest: What is the oldest source of genetic diversity in Africa? Is it the Sahara "plains" of the East African "mountains"? The people of the oasis of Sahara are not direct descendants of the people that lived there before the last dry-up, around 5,000 years ago. The original population was hunter-gatherer and so, very much mobile. They move as soon as saw the drought coming. Their descendant are now in W Africa, in N Africa (or maybe not, this is another interesting point of contest: did people from outside Africa re-colonised N Africa in the last few thousands years?) and, of course, in the Nile Valley. The current inhabitants of Sahara oasis are linked to neolitic expansion of cattle herders and maybe farmers. Finally, I know where is the solution to this question: it is the Congo Basin. The day we can research the genetics and languages of the heart of Africa, now barred by war, we will have the answer. Another interesting point for genetic research, now open to science, is the Zambeze and Limpopo rivers area. What about this? Anyone one have fresh info about human diversity south of the Equator? [/QB][/QUOTE]
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