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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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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.