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
You can only remember 4 things at a time.
31
Poor eyesight (myopia) is associated with higher IQ.
232
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