I thought that this story was interesting. Here are a couple of snippets:
“The length of a man’s fingers can reveal how physically aggressive he is, Canadian scientists have said.
The shorter the index finger is compared to the ring finger, the more boisterous he will be, University of Alberta researchers said.
But the same was not true for verbal aggression or hostile behaviours, they told the journal Biological Psychology after studying 300 people’s fingers.
The trend is thought to be linked to testosterone exposure in the womb.”
“Professor John Manning from the University of Central Lancashire’s department of psychology, who first realised that sex hormone exposure in the womb influences finger length, agreed.
He said certain individual characteristics correlate better with finger length than others.
“For example, if you had a group of runners and they were about to start a race I could predict reasonably well who was going to win based on their finger length.
“But I would not be able to predict whether someone was neurotic or not.”