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There are approximately 3 million unintended pregnancies in the United States each year.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.