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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 horizontal fraction bar was introduced by the Arabs.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.