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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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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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Cyanide works by making the human body unable to use oxygen.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.