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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.