Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Cyanide works by making the human body unable to use oxygen.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
MacArthur and Wilson's theory of island biogeography.