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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Green tea is able to stop the scent of garlic or onion from causing bad breath.
Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
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.
There are 20 feet of blood vessels in each square inch of human skin.