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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

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There are 20 feet of blood vessels in each square inch of human skin.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

An 1891 cartoon blames immigrants for the ills of American society: anarchy, socialism, mayhem, and An 1891 cartoon blames immigrants for the ills of American society: anarchy, socialism, mayhem, and
White-Collar Crime White-Collar Crime
Schematic representations of (a) random, (b) alternating, (c) block, and (d) graft copolymers. Schematic representations of (a) random, (b) alternating, (c) block, and (d) graft copolymers.
Gas molecules have no bonds to other molecules and move in random motion. Gas molecules have no bonds to other molecules and move in random motion.
) Random assortment of maternal (blue) and paternal (purple) chromosomes at metaphase ) Random assortment of maternal (blue) and paternal (purple) chromosomes at metaphase
One generation of random mating produces Hardy–Weinberg equilibrium One generation of random mating produces Hardy–Weinberg equilibrium
Video: Allergic Rhinitis

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