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
The world's youngest parents were 8 and 9 and lived in China in 1910.
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Forty percent of Americans have never visited a dentist.
33
15 percent of Americans secretly bite their toes.
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On average, a person will spend about five years eating during his or her lifetime.
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85% of movie actors earn less than $5,000 a year from acting!
20
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The world's shortest man measures only 21.5 inches.
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