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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
Did you know?
Your heart beats over 36 million times a year.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.