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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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Your heart beats over 36 million times a year.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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In 1864, the first barbiturate (barbituric acid) was synthesized.