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
Lee Presson and the Nails "Balls in Your Face", a download-only album of ballroom dance music. In recent years, the band has found a new audience in the steampunk/dieselpunk community, headlining in 2012 at the Nova Albion Steampunk Exhibition in Santa Clara, CA in 2011, at Her Royal Majesty's Steampunk Symposium at the Queen Mary in Long Beach, CA from 2012 to 2015, and at Clockwork Alchemy in San Jose, CA from 2013 to 2018. They were also a headlining act at the first Steamstock in Richmond, CA in 2013. Lee Presson and the Nails Lee Presson and the Nails is a swing band that