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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.