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Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
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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.
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There are 20 feet of blood vessels in each square inch of human skin.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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People about to have surgery must tell their health care providers about all supplements they take.