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
Dolphins have names for one another.
18
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8