Forty percent of Americans have never visited a dentist.
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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
In Haiti, only 1 out of every 200 people own a car.
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Intelligent people have more zinc and copper in their hair.
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One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
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Humans are capable of running 40 mph according to a study by bio-mechanical expert Dr. Matthew Bundle. Today's fastest man, Usain Bolt, has a top speed of 28 mph.
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