Poor eyesight (myopia) is associated with higher IQ.
232
In the US, people can be rejected from joining the police force if they are too intelligent.
45
You can only remember 4 things at a time.
31
The world's smartest pig, owned by a mathematics teacher in Madison, WI, memorized the multiplication tables up to 12.
264
Dolphins have names for one another.
18
Intelligent people have more zinc and copper in their hair.
233
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29