New twist on out-of-Africa theory

http://www.abc.net.au/science/news/stories/s1153697.htm
DNA analysis presented at a genetics conference that gives a new twist on the out-of-Africa hypothesis of human origins. U.S. researcher Professor Alan Templeton doesn't support the so-called replacement theory in which African hominids caused the extinction of other Homo species. Instead, he believes that his analysis of the human genome showed that prehistoric gene-swapping created a single evolutionary lineage beginning in Africa and ending where we are today.