Dolphins have names for one another.
18
You can only remember 4 things at a time.
31
In the US, people can be rejected from joining the police force if they are too intelligent.
45
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