Intelligent people have more zinc and copper in their hair.
233
Intelligent men tend to be more sexually faithful.
31
Forty percent of American adults cannot fill out a bank deposit slip correctly.
155
You can only remember 4 things at a time.
31
Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
9
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
In 1996, research found that having excessive body hair is linked to higher intelligence.
23