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Journey to the Microcosmos: Can Microbes Just Appear Out Of Nowhere?
I find it really interesting just how hard it was to prove that spontaneous generation was an inaccurate hypothesis.
Spontaneous generation actually seemed to have strong evidence for it becuase living things seemed to keep appearing out of nowhere and no-one could work out where they were coming from.
In this episode of Journey To Microcosmos, James sets up an experiment and finds that living things seem to have "mysteriously appeared" inside a bottle.