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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
Illicit drug use costs the United States approximately $181 billion every year.