Intelligent men tend to be more sexually faithful.
31
You can only remember 4 things at a time.
31
Poor eyesight (myopia) is associated with higher IQ.
232
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Dolphins have names for one another.
18
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