From The Times
December 11, 2007
Why the human race is growing apart
Mark Henderson, Science Editor
http://www.timesonline.co.uk/tol/news/uk/science/article3031104.ece
Races have evolved away from each other over the past 10,000 years, according to new research that challenges standard ideas about the biological significance of ethnicity.

A genetic analysis of human evolution has shown that rather than slowing to a standstill it has speeded up, with different pressures on different populations pushing racial groups further apart. Scientists behind the findings suggest that European, African and Asian populations grew genetically more distinct from each other over several thousand years, as their environments took them down different evolutionary paths.