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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.
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There are 20 feet of blood vessels in each square inch of human skin.
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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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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.