Dolphins have names for one another.
18
Intelligent people have more zinc and copper in their hair.
233
Poor eyesight (myopia) is associated with higher IQ.
232
Forty percent of American adults cannot fill out a bank deposit slip correctly.
155
Intelligent men tend to be more sexually faithful.
31
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