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Illicit drug use costs the United States approximately $181 billion every year.
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There are more sensory neurons in the tongue than in any other part of the body.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Cyanide works by making the human body unable to use oxygen.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.