The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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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.
This young child is pulling at the ear and acting fussy, two important signs of otitis media.