Yu Youzhen, a Chinese millionaire, works as a street sweeper for the sanitation department to set an example for her children.
11
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
‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
8
One in 500 humans has one blue eye and one brown eye.
145
In 2005, 25 percent of Americans over the age of 50 played video games, an increase from nine percent in 1999.
82
In 75% of American households, women manage the money and pay the bills.
97