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
Dolphins have names for one another.
18
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
Intelligent men tend to be more sexually faithful.
31
You can only remember 4 things at a time.
31