ELI5: Why did microbes get stuck in the curves of the long-necked flasks in Louis Pasteur’s experiment?

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Why could they not travel through the S-shaped curves? Can’t some microbes move on their own?

Comments

  1. hobopwnzor Avatar

    Microbes can move on their own but they can’t travel several inches up a glass neck. They’re very slow movers as they are incredibly small.