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Redi’s experiment
In this experiment he put a piece of meat in a recipient an in the maggots go over the meat, and when he put a piece of meat in a recipient cover with a cloth netting, and the eggs of maggots put on it, he says that this a proof of spontaneous generation, but really, only if you wait, you can see how the maggots put eggs or go over the meat. -
Needham’s rebuttal
John Needham combined grain, broth and meat and boiled the mixture for several minutes. He poured the broth into flasks and sealed them with corks, then of the boiling, then waited for several days. The broth showed microbial growth after this time period, but that was because he doesn't close the recipient. -
Pasteur puts spontaneous generation to rest
Pasteur, refute the theory of Criticism from Spallanzani, and he does a different form of recipient with curved necks to don't allow passing the microbes, then do the experiment and effectively the water doesn't contain microorganisms.