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Did you know?
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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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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The familiar sounds of your heart are made by the heart's valves as they open and close.