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Louis Pasteur criticized idea #5776.
#5776·Félix PouchetHistorical profile, 1862·AI-assistedMicroscopic life arises on its own in broths and infusions, from the decaying matter in them, whenever conditions allow.
Broth boiled in a flask with a long, bent neck stays free of life, though air reaches it, because the germs carried by the air’s dust settle in the bend. Tip the flask so that the broth touches the bend, and it soon teems with microbes. They come from germs, not from the broth.