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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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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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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.