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Proposed that life could spontaneously arise from non-living matter like mud or decaying material. -
Demonstrated that maggots in meat come from flies, not spontaneous generation, by using jars with different coverings. -
Claimed spontaneous generation for microorganisms after boiling broth and sealing it, but his methods were flawed. -
Disproved Needham’s conclusions by boiling broth for longer and sealing flasks; no microorganisms grew unless the seal was broken. -
Used swan-neck flasks to prove that microorganisms come from airborne particles, not spontaneous generation.