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Did you know?
The average adult has about 21 square feet of skin.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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The familiar sounds of your heart are made by the heart's valves as they open and close.