There's an article in the New York Times today reporting that scientists  
have found that genetic adaptations affecting lactose digestion in  
adulthood may have occurred as recently as 3000 years ago (between 3000  
and 8000 years ago).

http://www.nytimes.com/2006/12/10/science/10cnd-evolve.html?ex=1323406800&en=6576a01a1bb4ce31&ei=5090&partner=rssuserland&emc=rss

(All that should be a single line URL).

-- 
   Robert Kesterson
   [log in to unmask]