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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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Blood is approximately twice as thick as water because of the cells and other components found in it.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

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