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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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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.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Medication errors are three times higher among children and infants than with adults.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."