If you want to know how aggressive a man is, check out his hands, say researchers at the University of Alberta. They examined the fingers of 300 men and women, and correlated the results with answers to questionnaires filled out by the participants.

It turned out that the shorter a man's index finger was, compared to his ring finger, the more likely he was to be aggressive. No such relationship between finger length ratios and personality emerged among the women.
Sure, I can see you now. You just took your hand off the mouse, straightened out your fingers, and judged the lengths of the index and ring fingers. Even the women. Heh. I did it, too.

Canada's tax money at work.