Intelligent men tend to be more sexually faithful.
31
Intelligent people have more zinc and copper in their hair.
233
Poor eyesight (myopia) is associated with higher IQ.
232
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
Dolphins have names for one another.
18
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29