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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.