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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.