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Author Question: An astronaut who weighs 800 N on the surface of the earth lifts off from planet Zuton in a space ... (Read 85 times) |
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.
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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.