Interbreeding between archaic and modern humans been shown that Neanderthal ancestry has been selected against in conserved biological pathways, such as RNA processing. Consistent with the hypothesis that purifying selection has reduced Neanderthal contribution in present-day modern human genomes, Upper Paleolithic Eurasian modern humans (such as the Tianyuan modern human) carry more Neanderthal DNA (about 4–5%) than present-day Eurasians modern humans (about 1–2%). Genes affecting keratin were found to have been introgressed from Neanderthals into modern humans (shown in East Asians and Europeans), suggesting that these genes gave a morphological adaptation in skin and hair to modern humans to cope with non-African environments. This is likewise
History of removal of leg and underarm hair in the United States 2008. A woman who does not remove body hair is perceived as being less sexually attractive, sociable and intelligent than the same woman without body hair; and incites disgust. History of removal of leg and underarm hair in the United States At the outset of the United States, leg and underarm hair removal was not a common practice for women. In fact, body hair had been viewed as a boon by Caucasian people, and therefore removal was not an imported practice from European settlers into the United States. American women's new practice of armpit and leg hair removal began in