Muhammad is the most common name in the world.
96
Most people smile when they are frustrated, according to a study.
15
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
Senegalese women spend an average of 17.5 hours a week just collecting water.
27
You will experience the billionth second of your life when you are 31 years old.
21
You share your birthday with at least 9 other million people in the world.
201
Roughly a quarter of the world's people live in China.
50