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There are more sensory neurons in the tongue than in any other part of the body.
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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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The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.