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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.