This article in early view on the PNAS website by J-J Hublin and Richard Klein argues that North African human cultures making Aterian Middle Stone Age tool industry might have been the source population for modern humans.
This area is near-and-dear to me because I was on a dig there in the summer of 2009, the year the team discovered a modern human skull. This skull, nicknamed Bouchra, was recently featured in a special on the National Geographic Channel.
