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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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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.