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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
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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.