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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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The human body produces and destroys 15 million blood cells every second.
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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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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.