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
Rite of Passage (The Outer Limits) extinct when the aliens found Earth, and have taken it upon themselves to restore life wherever it has vanished. Shal and Brav's child is the first human born naturally in centuries. They are given back their son and return to the commune. Rite of Passage (The Outer Limits) "Rite of Passage" is an episode of "The Outer Limits" television show. It was first broadcast on March 13, 1998, during the fourth season. The birth of a child is a joyful event, but for Shal and Brav, two young naive humans who live in a small commune in the woods, it