You can only remember 4 things at a time.
31
Approximately one-third of the population can't snap their fingers!
91
Intelligent men tend to be more sexually faithful.
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
People who have a strong friendship possess the ability to communicate with one another through facial expressions.
46
Roughly a quarter of the world's people live in China.
50