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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The horizontal fraction bar was introduced by the Arabs.
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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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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.