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.
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Most of the world's people must walk at least 3 hours to fetch water!
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Yu Youzhen, a Chinese millionaire, works as a street sweeper for the sanitation department to set an example for her children.
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Roughly a quarter of the world's people live in China.
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The average woman uses her height in lipstick every 5 years.
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Intelligent people have more zinc and copper in their hair.
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The average American consumes 9 pounds of food additives every year.
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