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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
Did you know?
The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.