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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.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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There are 60,000 miles of blood vessels in every adult human.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).