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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.