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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One in 500 humans has one blue eye and one brown eye.
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Most people smile when they are frustrated, according to a study.
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In Korea, a child’s first birthday is the most important. In one part of the celebration, several items are placed on a table. The one that the baby picks up first is said to predict their future.
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76% of Americans celebrate New Year's Eve in groups of less than 20.
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In a year, the average person walks four miles to make his or her bed.
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Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair.
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In 75% of American households, women manage the money and pay the bills.
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