Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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There are 20 feet of blood vessels in each square inch of human skin.
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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
Vision with macular degeneration is experienced with an inability to focus in the center of the visu
This engraving by William Russell Birch shows Congress Hall (left), which was occupied by Congress f
In this cartoon, Boss Tweed welcomes cholera—a skeletal figure of death carrying a handbag from “Asi
Example of a cycle billing schedule.
Examples of visual fields of simple cortical cells.
Visual Elements of Pictorial Expression: A. Carpet Page from the Lindisfarne Gospels