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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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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.