Finger Length Predicts Aggression in Men
The research, done at the University of Alberta and announced Wednesday, 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. Scientists have known for more than a century that the finger-length ratio differs between men and women. Recently, scientists found a connection between finger lengths and the amount of testosterone that a fetus was exposed to in the womb: the shorter the index finger relative to the ring finger, the higher the amount of prenatal testosterone.The new study found such a fetus is more likely to be a physically aggressive adult, according to Peter Hurd and his graduate student Allison Bailey.
Interestingly, I found that the traditional sciences of palmistry have exactly opposite to say. Read a piece here, which says it is a long index finger which makes you dictating and authoritative.
More about scientific explanations about relative lengths of Index and Ring fingers, here.