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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
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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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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.