In the US, people can be rejected from joining the police force if they are too intelligent.
45
Intelligent people have more zinc and copper in their hair.
233
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
Dolphins have names for one another.
18
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
You can only remember 4 things at a time.
31