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Watch Crash Course History of Science Season 1 Episode 24 Online

  • 2/10
  • COUNTRIES: United States of America
  • Subtitles: English

It's all about the SUPER TINY in this episode of Crash Course: History of Science. In it, Hank Green talks about germ theory, John Snow (the other one), pasteurization, and why following our senses isn't always the worst idea.