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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

