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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.