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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?
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Cyanide works by making the human body unable to use oxygen.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.