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In 1864, the first barbiturate (barbituric acid) was synthesized.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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