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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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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
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The average office desk has 400 times more bacteria on it than a toilet.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.