‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
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Men are more attracted to women whose bone structure is similar to their own mothers. It's called "sexual imprinting".
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Intelligent people have more zinc and copper in their hair.
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2% of Europeans lack the genes for smelly armpits.
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Most people smile when they are frustrated, according to a study.
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