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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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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Blood is approximately twice as thick as water because of the cells and other components found in it.