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The average adult has about 21 square feet of skin.
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The horizontal fraction bar was introduced by the Arabs.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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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.