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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.
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On average, the stomach produces 2 L of hydrochloric acid per day.