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Did you know?
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.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The longest a person has survived after a heart transplant is 24 years.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.