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Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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There are more bacteria in your mouth than there are people in the world.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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The human body produces and destroys 15 million blood cells every second.