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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.
Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.