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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.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
The familiar sounds of your heart are made by the heart's valves as they open and close.
The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.