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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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.