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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.