The offspring of two sets of identical twins are legally cousins but genetically siblings.
63
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
Americans did not commonly use forks until after the Civil War.
82
Babies that are breastfed are more likely to be slimmer as adults than those that are not breastfed.
110
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973
Most people turn their music down in the car when finding a street sign to "see better".
34
Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
99
76% of Americans celebrate New Year's Eve in groups of less than 20.
55