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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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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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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.