Yet another existential mystery
Although humans greatly outnumber our closest living relatives the great apes, for some reason the genetic diversity of modern humans is much lower, posing a puzzle that only gets more puzzling the further geneticists look into our evolutionary past. Not only is this disparity counterintuitive, it contradicts a basic tenet of population genetics theory, that larger populations should display greater genetic diversity.
Luke Premo, an assistant professor of anthropology, has taken a stab, with coauthor Jean-Jacques Hublin, at exploring the conundrum in the Proceedings of the National Academy of Sciences (January 6, 2009).
Premo is an evolutionary anthropologist who studies Pliocene and Pleistocene hominin behavior … » More …