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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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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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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.