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Everyone has one nostril that is larger than the other.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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There are 20 feet of blood vessels in each square inch of human skin.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.