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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.
Did you know?
Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.
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Medication errors are three times higher among children and infants than with adults.
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The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
The horizontal fraction bar was introduced by the Arabs.

