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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Illicit drug use costs the United States approximately $181 billion every year.
The average adult has about 21 square feet of skin.
In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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