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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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The longest a person has survived after a heart transplant is 24 years.
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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.