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Francesco Redi
Francesco Redi was a Italian physician and poet. Is recognized for his experiments, one of them was an attack of spontaneous generation in 1668. That experiment it was about worms emerging spontaneously in rotten flesh. -
John Needham
John Needham was a English clergyman. He wants to claim that spontaneous generation could occur. He made an experiment which was about to boil broth to kill the organisms and then cooled and sealed it. After a while he saw life in that broth. This contradicts Redi's idea. -
Lazzaro Spallanzani
Lazzaro Spallanzani was a Italian priest. He was nit agree with Needham idea. He boiled the broth at a higher temperature in order to kill the microorganisms present. For a while the broth had no trace of life. Although when opening the flask, microorganisms
rapidly grew in the broth. -
Louis Pasteur
Louis Pasteur was a notable French scientist. He subsequently designed several bottles with S curved necks that were oriented downward.He placed a nutrient-enriched broth in one of the bottles, he boiled it and observed no life in the jar for one year. Then he manipulated the flask so that the air could enter more directly. In the days he observed ways of life.