ScienceDaily -- Genetically, culturally and ethically the Khoe-San have something special to add to this world. The largest genomic study ever conducted among Khoe and San groups reveals that these groups from southern Africa are descendants of the earliest diversification event in the history of all humans -- some 100,000 years ago, well before the 'out-of-Africa' migration of modern humans.
MORE: http://www.sciencedaily.com/releases/2012/09/120920141139.htm
See also...
How Organisms Evolve New Functions: Evolution Is as Complicated as 1-2-3
http://www.sciencedaily.com/releases/2012/09/120919135411.htm