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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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Everyone has one nostril that is larger than the other.