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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
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Intelligent people have more zinc and copper in their hair.
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More redheads are born in Scotland than in any other part of the world.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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Women mature much faster than men.
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People who have a strong friendship possess the ability to communicate with one another through facial expressions.
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