The average adult has about 21 square feet of skin.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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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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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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The longest a person has survived after a heart transplant is 24 years.
