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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
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Asthma cases in Americans are about 75% higher today than they were in 1980.