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The human body produces and destroys 15 million blood cells every second.
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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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The horizontal fraction bar was introduced by the Arabs.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.