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
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
There's an isolated tribe in Zimbabwe where the people have only two toes, dubbed the 'ostrich people'.
10
According to the American Society for Microbiology, 90% of women and 75% of men wash their hands after using a public restroom.
170
47% of people have a nightmare at least once a month.
186
Only 2% of the Earth's population are natural redheads.
13
