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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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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.