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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.