Intelligent people have more zinc and copper in their hair.
233
Forty percent of American adults cannot fill out a bank deposit slip correctly.
155
You can only remember 4 things at a time.
31
Intelligent men tend to be more sexually faithful.
31
Dolphins have names for one another.
18
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