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Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.