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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Blood is approximately twice as thick as water because of the cells and other components found in it.