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The average adult has about 21 square feet of skin.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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In 1864, the first barbiturate (barbituric acid) was synthesized.