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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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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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The FDA recognizes 118 routes of administration.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.