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Is Kmtian wavy and straight hair the only trait not shared with Ancient Nubians?
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[QUOTE]Originally posted by Faheemdunkers: [QB] [QUOTE]Originally posted by Swenet: [qb] [QUOTE]Originally posted by Faheemdunkers: [QUOTE]Originally posted by Swenet: Africa offers plenty of the said environmental zones (Sahel, Sahara, Kalahari, the region along the red sea and the region opposite of Madagascar), as do ALL continents.[/QUOTE][qb]No they don't.[/qb] There is only one type of adaptation in Africa: heat, of which is divided into two environments: humid heat and dry heat. [/QUOTE][i]Nasal bridge elevation and elongation is also a trait influenced by the forces of selection. These [b]are related to the relative lack of moisture in inspired air (Glan-ville, 1969).[/b] That in turn is only very tenuously determined by the intensity of solar radiation. [b]Air in tropical deserts, of course, is obviously arid[/b] (...)[/i] --Brace 1993 [i]Weiner (1954) reworked the data collected by Thomson and Buxton (1923) using wet bulb temperature and the vapor pressure of the air as additional climatic variables'that may be correlated with Nasal Index. [b]In 146 groups studied Weiner (1954) found nasal index to be most highly correlated with the vapor pressure of the air(r = 0.82)[/b] and he postulated, that the functional basis underlying the Nasal Index - climate relationship [b]is the humidification of the inspired air.[/b][/i] --Leon, 1975 :rolleyes: Stop wasting my time, dufus. Either prove Glanville, Leon etc wrong, or shut your trap. [/qb][/QUOTE]Easy to do - http://134.2.48.77/fileadmin/website/arbeitsbereich/ufg/palaeoanthropologie/Mitarbeiter/Nobacketal2011.pdf "The second prediction, that trends in nasal cavityshape follow climatic trends of increased difficulty of airconditioning: from hot–humid to cold–dry, was also supported. From the PLS analysis it is shown that nasal cavity shape depends on a combination of both temperature and vapor pressure factors. Maximum covariation between nasal cavity shape and climatic factors follows a cline from hot–humid to cold–dry climate, via hot–dry and cold–humid climate. Temperate populations score intermediate. Although vapor pressure and temperature factors both have similar loadings on the first PLS dimension, the grouping of the populations indicates that [b]the main difference in shape is related to temperature[/b] (see Fig. 5). This contradicts the notion that humidity should play a more important role in nasal climate adaptation, as humidification is a more important factor for air-conditioning than temperature adjustment (Negus, 1958)." [/QB][/QUOTE]
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