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Did you know?
There are 60,000 miles of blood vessels in every adult human.
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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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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Illicit drug use costs the United States approximately $181 billion every year.