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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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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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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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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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