The skin of what type of animal is used to treat burns?
Fish skin, usually from Atlantic cod or Nile tilapia, has anti-inflammatory and anti-bacterial properties that support healing of some wounds including burns and diabetic foot ulcers.
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- What was miasma theory?
“Before germ theory, many people believed diseases were caused by "bad air," called miasma.”
Reference: Encyclopaedia Britannica
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Who discovered the bacterium that causes tuberculosis?
Robert Koch identified the bacterium that causes tuberculosis in 1882, and World Tuberculosis Day is held on March 24, the anniversary of his announcement.
How did the Louisiana Purchase change the size of the US?
In 1803 the US bought the Louisiana Territory from France for about $15 million. The deal roughly doubled the size of the country.