tag:blogger.com,1999:blog-3734925856292601239.post5045400620672344458..comments2024-03-22T15:55:34.030-04:00Comments on Evo and Proud: Tales from old bonesPeter Frosthttp://www.blogger.com/profile/04303172060029254340noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-3734925856292601239.post-80650664215893000832019-09-07T22:49:52.765-04:002019-09-07T22:49:52.765-04:00QUote: "In sum, archaic admixture did provide...QUote: "In sum, archaic admixture did provide modern humans with some ready-made alleles that have helped them adapt to new climates and new diets, but this advantage hardly applies to Africa. There, modern humans were already adapted to the local climate and diet. Archaic admixture couldn't have done much to help them adapt, since the new environments they faced were cultural ones of their own making."<br /><br />uhm, Africa is bigger than North America and Europe combined...how can one assume all environments/climates are equal. Is the jungle in Congo the same as the Savanna or the Meditterean-like climate of far southern Africa? Are any of these the same as the Sahel? What about the Ethiopian highlands?<br /><br />UncleTomRuckusInGoodWhiteWorldhttps://www.blogger.com/profile/07508650487951730570noreply@blogger.comtag:blogger.com,1999:blog-3734925856292601239.post-25772001138482098912017-10-05T14:58:46.848-04:002017-10-05T14:58:46.848-04:00Thanks! Yes, that sounds very plausible that Khois...Thanks! Yes, that sounds very plausible that Khoisan and African Pygmies bred with various archaic lineages, which pushes back the split off date with the techniques we have. It will be interesting to see how the split off date is assessed in coming years.Sidnoreply@blogger.comtag:blogger.com,1999:blog-3734925856292601239.post-87868519453661261772017-10-03T10:12:10.879-04:002017-10-03T10:12:10.879-04:00Hi Sid,
I agree that the separation between Khois...Hi Sid,<br /><br />I agree that the separation between Khoisans and other Africans is very old and probably precedes the Out of Africa event. Pygmies likewise seem to be a very old lineage. 200,000 years ago? I'm skeptical. Knight et al. (2003) talk about a time depth of tens of thousands of years. The problem here is that there seems to be a higher level of archaic admixture in Khoisans, and this has the effect of making the time of separation seem farther back than it really was.<br /><br />Knight et al. (2003). African Y Chromosome and mtDNA Divergence Provides Insight into the History of Click Languages, Current Biology, 13, 464-473.<br />http://www.sciencedirect.com/science/article/pii/S0960982203001301<br /><br />Peter FrostAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3734925856292601239.post-46241460161050281212017-10-02T02:58:51.361-04:002017-10-02T02:58:51.361-04:00"Modern humans arose some 80,000 years ago in..."Modern humans arose some 80,000 years ago in eastern Africa through a series of population expansions that culminated twenty thousand years later in a big bang that spread outward in Africa and then into the Middle East, Europe, and Asia (Watson et al. 1997)."<br /><br />From what I've read, the Khoisan and other human races split off from each other roughly 200,000 years ago. With African Pygmies, that goes up to 300,000 years ago. (Correct me if the numbers are off.)<br /><br />Is there something which clearly distinguishes modern human beings which evolved roughly 80,000 years ago from the archaic kinds? Roughly speaking, Khoisan and Bushmen could be thought of as archaic populations. Sidnoreply@blogger.com