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Medication errors are more common among seriously ill patients than with those with minor conditions.
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.