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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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Vaccines prevent between 2.5 and 4 million deaths every year.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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