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Reconstructions by Elisabeth Daynès, how and why?
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[QUOTE]Originally posted by Trollkillah # Ish Gebor: [QB] [QUOTE]Originally posted by the lioness,: [qb] [QUOTE]Originally posted by Truthcentric: [qb] I have just downloaded this new limb proportion study onto my laptop at UCSD. If anyone's interested in taking a look, PM me your e-mail so I can send it to you. To give you a preview of the findings, here's a dendrogram showing similarities in limb proportions between the populations measured: [URL=http://s371.photobucket.com/user/brandonpilcher/media/b9bdb805-bd92-4544-9f56-0ba40133a41f_zpse13095c4.jpg.html] [IMG]http://i371.photobucket.com/albums/oo160/brandonpilcher/b9bdb805-bd92-4544-9f56-0ba40133a41f_zpse13095c4.jpg[/IMG][/URL] Trenton Holliday 2013[/qb][/QUOTE][/qb][/QUOTE]Let's look at this critically for a moment. [QUOTE] [b]Our results demonstrate [b]an ancient local evolution[/b] in Tunisia of some African haplogroups (L2a, L3*, and L3b).[/b] [...] Since the end of the extreme Saharan desiccation, lasting from before 25,000 years ago up to about 15,000 years ago, the Sahara has had post- and pre- Holocene cyclical climatic changes (Street and Grove 1976), and corresponding increases and decreases in population are probable. Wetter phases with better habitats perhaps allowed for increased colonization and gene and cultural exchange. Desiccation would have encouraged the emigration and segmentation of populations, with resultant genetic consequences secondary to drift producing more variation. During the last glacial period, the Sahara was even bigger than it is today, extending south beyond its current boundaries (Ehret 2002). About 13,000 years ago, large parts of the Sahara were as dry as the desert is now (White and Mattingly 2006). The end of the glacial period brought more rain to the Sahara, especially from about 8500 to 6000 BC (Fezzan Project 2006). By around 3400 BC, the monsoon retreated south to approximately where it is today, leading to the gradual desertification of the region (Kröpelin 2008). Thus the Sahara, through its cyclical environmental changes, might be seen as a microevolutionary “processor” and/or “pump” of African people that “ejected” groups to the circum-Saharan regions in times of increasing aridity. [/QUOTE]--Frigi et al., 2010 Ancient Local Evolution of African mtDNA Haplogroups in Tunisian Berber Populations [/QB][/QUOTE]
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