I’ve been doing a lot of anthropology background reading and research lately. (You will see the special project this was for later this year.) Along with the specifics I’m looking for, there are so many fascinating things I encounter, like this:
“There are more different versions of genes in contemporary modern human populations in Africa than in all the rest of the world put together (Tishkoff and Verrelli 2003). This finding is consistent with the view that Africa has been the dominant source of the novel genes and gene combinations of modern humans.”
from: Miller, Barbra; Bernard Wood, Andrew Balansky, Julio Mercader, Melissa Panger (2006) Anthropology. Boston Massachusetts: Allyn and Bacon.