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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
Did you know?
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.