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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).
Did you know?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Cyanide works by making the human body unable to use oxygen.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.