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 == Removal of unsourced claim in human hairlessness == 

 The claim was ""Humans seem hairless not because of a lack of follicles but because of the predominance of vellus fibers which are  thinner, shorter, and more transparent than terminal fibers. The density of human hair follicles on the skin is about the average for an animal of equivalent size."" And it cited:  

 I accessed this article and it makes no such claim. Beyond that, it has no discussion on the appearance of human hair follicles and actually argues the opposite: that human hair density is, in fact, far less than that of other primates. The first sentence of the abstract actually suggests that the sourced claim is wrong: 

 ""Allometric analyses of hair densities in 23 anthropoid primate taxa reveal that increasingly massive primates have systematically fewer hairs per equal unit of body surface."" 

 So regardless of whether or not the hairs are ""vellus fibers"" (neither word even appears anywhere in the article) the actual density is less."