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[QUOTE]Originally posted by the lioness,: [QB] http://www.sciencemag.org/news/2012/07/genetic-code-tells-hunter-gatherer-tales A group of variants unique to the Hadza spanned the DNA encoding for a cannabinoid receptor, a cell surface protein that responds to tetrahydrocannabinol—the active ingredient in marijuana—which is intriguing because Tishkoff's team observed that the Hadza smoke large amounts of marijuana. The three populations also had distinctive variants around genes that produced blood compounds involved in injury repair. What has most intrigued some researchers, however, is that the study found genetic evidence that all three groups had intermingled sexually with an unknown, older species—possibly an African equivalent of the Neanderthal species in Europe. Not only did the Hadza, Sandawe, and Pygmy people all have significant lengths of DNA from this unknown species, but the union happened at about the same time as European humans were hobnobbing with Neanderthals—tens of thousands of years ago. [/QB][/QUOTE]
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