Poor eyesight (myopia) is associated with higher IQ.
232
Dolphins have names for one another.
18
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
Intelligent men tend to be more sexually faithful.
31
In 1996, research found that having excessive body hair is linked to higher intelligence.
23