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
Skin Deep (The Outer Limits) Skin Deep (The Outer Limits) "Skin Deep" is an episode of "The Outer Limits" television show. It was first-aired at 4 February 2000, during the sixth season. Sid Camden gets a hold of an experimental holographic disguise device that allows him to acquire the image of his handsome co-worker, Chad Warner... Sid Camden, a rather unremarkable, socially inept man, works in an accounting department of a high-tech company known as "Veil-Tech". He spends much of his spare time in chatrooms. One day Hal, one of the project managers, secretly loans Sid a prototype of one of the company's latest developments