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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Only 2% of the Earth's population are natural redheads.
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Most people smile when they are frustrated, according to a study.
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More redheads are born in Scotland than in any other part of the world.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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There's an isolated tribe in Zimbabwe where the people have only two toes, dubbed the 'ostrich people'.
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It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
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Americans collectively eat one hundred pounds of chocolate every second.
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