You can only remember 4 things at a time.
31
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
More boys than girls are born during the day; more girls are born at night.
120
Americans did not commonly use forks until after the Civil War.
82
40% of people who are rejected in romantic love slip into clinical depression.
72