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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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