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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).
More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
Blood is approximately twice as thick as water because of the cells and other components found in it.
Excessive alcohol use costs the country approximately $235 billion every year.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.