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Therefore Wheeler said that humans, who should have body hair based on predictions of body volume alone for savanna mammals, evolved no body hair after evolving bipedalism, which he said reduced the amount of body area exposed to the sun by 40%, reducing the solar warming effect on the human body. [13]
For broader coverage of this topic, see Nudity. Nakedness and clothing use are characteristics of humans related by evolutionary and social prehistory. The major loss of body hair distinguishes humans from other primates. Current evidence indicates that anatomically modern humans were naked in prehistory for at least 90,000 years before they invented clothing. Today, isolated Indigenous ...
A number of other changes have also characterized the evolution of humans, among them an increased reliance on vision rather than smell (highly reduced olfactory bulb); a longer juvenile developmental period and higher infant dependency; [181] a smaller gut and small, misaligned teeth; faster basal metabolism; [182] loss of body hair; [183] an ...
The loss of heat through heat of evaporation by means of sweat glands is aided by air currents next to the skin surface, which are facilitated by the loss of body hair. [55] Another factor in human evolution that also occurred in the prehistoric past was a preferential selection for neoteny, particularly in females. The idea that adult humans ...
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, ... Loss of body hair occurs from 3 to 2 Ma, ...
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A few million years of evolution later, early humans had sparse body hair and more than 2 million sweat glands in their body. [ 26 ] [ 36 ] [ 37 ] Hairless skin, however, is particularly vulnerable to be damaged by ultraviolet light and this proved to be a problem for humans living in areas of intense UV radiation, and the evolutionary result ...
DNA analyses conducted since 2007 revealed the acceleration of evolution with regards to defenses against disease, skin color, nose shapes, hair color and type, and body shape since about 40,000 years ago, continuing a trend of active selection since humans emigrated from Africa 100,000 years ago.