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Did you know?
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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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.