35% of the people using personal ads for dating are already married!
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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.
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The “cheerleader effect”, the theory that girls look more attractive in groups, is scientifically proven.
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Half of all Americans over the age of 55 have no teeth.
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A chance of a woman having twins is increased after the age of 35. About 1 in 27 women will give birth to twins after this age. After 50 the chances of having twins is 1 in 9.
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