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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.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.
Cyanide works by making the human body unable to use oxygen.
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.