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There are 20 feet of blood vessels in each square inch of human skin.
Asthma cases in Americans are about 75% higher today than they were in 1980.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
In 1864, the first barbiturate (barbituric acid) was synthesized.
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