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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
The familiar sounds of your heart are made by the heart's valves as they open and close.
The average office desk has 400 times more bacteria on it than a toilet.
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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