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
Black Is the Color (of My True Love's Hair) Black Is the Color (of My True Love's Hair) "Black Is the Color (of My True Love's Hair)" (Roud 3103) is a traditional folk song first known in the US in the Appalachian Mountains but originating from Scotland, as attributed to the reference to the Clyde in the song's lyrics. The musicologist Alan Lomax supported this Scottish origin, saying that the song was an American "re-make of British materials." Many different versions of this song exist, some addressed to females and others addressed to males, as well as other differences: These words are set to two distinct melodies, one of