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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 oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.
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There are more bacteria in your mouth than there are people in the world.
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There are more sensory neurons in the tongue than in any other part of the body.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.