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The Origins of pharaonic stone carving: Nabta Playa (western desert)
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[QUOTE]Originally posted by Trollkillah # Ish Gebor: [QB] Repost, as a reminder. posted 06 January, 2012 11:01 Nick A. Drakea,1, Roger M. Blenchb, Simon J. Armitagec, Charlie S. Bristowd, and Kevin H. Whitee a Department of Geography, King’s College London, Strand, London WC2R 2LS, United Kingdom; b Kay Williamson Educational Foundation, 8 Guest Road, Cambridge CB1 2AL, United Kingdom; c Department of Geography, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom; dSchool of Earth Sciences, Birkbeck College, University of London, Malet Street, London WC1E 7HX, United Kingdom; and eDepartment of Geography, University of Reading, Whiteknights, Reading RG6 6AB, United Kingdom Edited by Ofer Bar-Yosef, Harvard University, Cambridge, MA, and approved November 22, 2010 (received for review August 23, 2010) Ancient watercourses and biogeography of the Sahara explain the peopling of the desert Evidence increasingly suggests that sub-Saharan Africa is at the center of human evolution and understanding routes of dispersal “out of Africa” is thus becoming increasingly important. The Sahara Desert is considered by many to be an obstacle to these dispersals and a Nile corridor route has been proposed to cross it. Here we provide evidence that the Sahara was not an effective barrier and indicate how both animals and humans populated it during past humid phases. Analysis of the zoogeography of the Sahara shows that more animals crossed via this route than used the Nile corridor. Furthermore, many of these species are aquatic. This dis- persal was possible because during the Holocene humid period the region contained a series of linked lakes, rivers, and inland deltas comprising a large interlinked waterway, channeling water and an- imals into and across the Sahara, thus facilitating these dispersals. This system was last active in the early Holocene when many spe- cies appear to have occupied the entire Sahara. However, species that require deep water did not reach northern regions because of weak hydrological connections. Human dispersals were influenced by this distribution; Nilo-Saharan speakers hunting aquatic fauna with barbed bone points occupied the southern Sahara, while peo- ple hunting Savannah fauna with the bow and arrow spread south- ward. The dating of lacustrine sediments show that the “green Sahara” also existed during the last interglacial (∼125 ka) and pro- vided green corridors that could have formed dispersal routes at a likely time for the migration of modern humans out of Africa. Here is the full paper, http://www.pnas.org/content/108/2/458.full.pdf In addition, http://www.quarryscapes.no/images/Egypt_sites/Aswan1.gif http://www.sciencemag.org/content/225/4662/645.extract.jpg Elaboration http://www.mosaicsciencemagazine.org/pdf/m13_04_82_01.pdf [/QB][/QUOTE]
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