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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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There are approximately 3 million unintended pregnancies in the United States each year.
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.