More than half the population of Kenya is under the age of 15.
71
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973
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
Roughly a quarter of the world's people live in China.
50
85% of movie actors earn less than $5,000 a year from acting!
20