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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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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.