Roughly a quarter of the world's people live in China.
50
About 2/3 of American men prefer boxers to briefs.
83
On average women can hear better than men.
170
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
In Haiti, only 1 out of every 200 people own a car.
23
The “cheerleader effect”, the theory that girls look more attractive in groups, is scientifically proven.
8