Testosterone

Finger Length Predicts Aggression in Men

Without pointing any fingers, a new study suggests a way to take the measure of tough characters. Research found a connection between the length of the male index finger relative to the ring finger and the tendency to be aggressive. No such connection was found in women. "More than anything, I think the findings reinforce and underline that a large part of our personalities and our traits are determined while we're still in the womb."