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

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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