The world's smartest pig, owned by a mathematics teacher in Madison, WI, memorized the multiplication tables up to 12.
264
Intelligent men tend to be more sexually faithful.
31
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
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
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8