Intelligent people have more zinc and copper in their hair.
233
In the US, people can be rejected from joining the police force if they are too intelligent.
45
Intelligent men tend to be more sexually faithful.
31
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Poor eyesight (myopia) is associated with higher IQ.
232