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Redi's experiment
The experiment consisted of putting meat in two different jars, one covered and one outdoors. In doing so, one could see how life had appeared in the open jar and not in the closed jar. -
Needham's rebuttal
The experiment of John Turbeville Needham was done in 1745, to refute the experiment that Francesco Redi had done in 1668. This experiment consisted of boiling a piece of broth to kill all its microorganisms, store it in a flask and seal it.
After a while, life appeared inside the flask, contradicting Francesco Redi. -
Criticism from Spallanzani
Lazzaro Spallanzani's experiment was done in 1768, to contradict the conclusions of John Needham. The experiment consisted of putting broth in a closed flask and heating the flask to kill all microorganisms.
In doing so, he observed that when the flask was closed, no life appeared, it began to appear when he opened it again, so he concluded that spontaneous generation did not exist and that it was polluted air. which carried the microbes. -
Pasteur's experiment
The experiment he did was to put broth in a gooseneck bottle and do different things with it. The first path he took was to heat the broth and leave it for a while, but no life appeared. The next step he took was to tilt the bottle so that it had more contact with the air, and life appeared in it. And finally he broke the swan neck and came back to life.