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Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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There are 20 feet of blood vessels in each square inch of human skin.
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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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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.