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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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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 tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.