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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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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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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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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.