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 world's smartest pig, owned by a mathematics teacher in Madison, WI, memorized the multiplication tables up to 12.
264
Intelligent people have more zinc and copper in their hair.
233
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
You can only remember 4 things at a time.
31