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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.