Genetic Drift is important

[The_Flying_Skeptic]

Coincidentally, TFS, this article was posted today on the news section of my Archaeology board.

http://www.sciencenews.org/view/generic/...st_clothes

Using DNA to trace the evolutionary split between head and body lice, researchers conclude that body lice first came on the scene approximately 190,000 years ago. And that shift, the scientists propose, followed soon after people first began wearing clothing.

Not the most charming of subjects, I grant you!

The article may be a good example of genetic drift or speciation by 'geographic' isolation. But in the case of the lice, the isolation was athropographic haha.