Tuesday, December 11, 2007

No wonder I feel rushed

Researchers: Human evolution speeding up

No wonder I feel rushed - according to a recent study of the human genome, our evolution is speeding up.

Get this: a mere 10,000 years ago (thousand, not million!), no one had blue eyes, most people had dark skin, and few people were able to metabolize cow's milk.

The protection of melatonin in darker skin was needed in equatorial Africa where the Sun's UVs are more plentiful. People who could metabolize cow's milk would have survived where food was scarce, and thus gone on to reproduce.

But the researchers wonder how blue eyes affected survival or reproduction. Isn't it obvious? Blue eyes are more attractive, so blue-eyed people would have attracted mates more easily than brown-eyed people.