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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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The longest a person has survived after a heart transplant is 24 years.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.