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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.