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Approximately 500,000 babies are born each year in the United States to teenage mothers.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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.