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Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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Video: Summation - defined, spatial, temporal & AP generation or not

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