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The average adult has about 21 square feet of skin.
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The horizontal fraction bar was introduced by the Arabs.
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Cyanide works by making the human body unable to use oxygen.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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.