Intelligent people have more zinc and copper in their hair.
233
Intelligent men tend to be more sexually faithful.
31
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Poor eyesight (myopia) is associated with higher IQ.
232
You can only remember 4 things at a time.
31
In the US, people can be rejected from joining the police force if they are too intelligent.
45