Back in the ice age, Northern European cavemen got all the chicks.
Thanks to a food shortage and a man shortage about 10,000 years ago, men were in such demand they had their pick of mates.
With so much competition among women to find a mate, nature and
evolution kicked in to give some cave women a distinctive look to
attract the opposite sex: blond hair and blue eyes.
So says a new study published in the British science journal Evolution and Human Behavior.