In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Dolphins have names for one another.
18
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
Poor eyesight (myopia) is associated with higher IQ.
232
Intelligent people have more zinc and copper in their hair.
233
You can only remember 4 things at a time.
31