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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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The horizontal fraction bar was introduced by the Arabs.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.