The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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There are 20 feet of blood vessels in each square inch of human skin.
An example of color blindness test. A person with red-green color blindness would not be able to dis