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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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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.