It was the end of our second hour driving down a pot hole-infested, rattle-the-teeth-out-of-my-head dirt road in Tanzania, and I was starting to feel as if my body was going to shake apart. The wind ...
A Maasai man with his goat herd in Tanzania. This man has a genetic adaptation to milk. Sarah Tishkoff et al. found several novel variants associated with lactose tolerance in East African ...