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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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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.