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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
Blood is approximately twice as thick as water because of the cells and other components found in it.
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