40% of people who are rejected in romantic love slip into clinical depression.
72
Roughly a quarter of the world's people live in China.
50
The “cheerleader effect”, the theory that girls look more attractive in groups, is scientifically proven.
8
Half of all Americans over the age of 55 have no teeth.
39
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
As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
687
Intelligent people have more zinc and copper in their hair.
233