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There are more sensory neurons in the tongue than in any other part of the body.

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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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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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The longest a person has survived after a heart transplant is 24 years.

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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.

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