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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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To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

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