According to the American Society for Microbiology, 90% of women and 75% of men wash their hands after using a public restroom.
170
Children laugh about 400 times a day, while adults laugh on average only 15 times a day.
973
The average person falls asleep in seven minutes.
115
Karl Pillemer, a professor, performed a study on thousands of elderly people and what advice they had about life. On happiness, there was a consensus: “the elders viewed happiness as a choice, not the result of how life treats you.”
13
Only 2% of the worlds population is blonde.
15
A chance of a woman having twins is increased after the age of 35. About 1 in 27 women will give birth to twins after this age. After 50 the chances of having twins is 1 in 9.
51
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
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11