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
Poor eyesight (myopia) is associated with higher IQ.
232
The higher someone’s I.Q. the more likely they are to be sleep deprived.
29
The world's smartest pig, owned by a mathematics teacher in Madison, WI, memorized the multiplication tables up to 12.
264
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8