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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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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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If you could remove all of your skin, it would weigh up to 5 pounds.