Here's why his experiment was so important:
* The Problem: Spontaneous generation was a widely held belief that living organisms could arise from non-living matter.
* Pasteur's Design: He designed an experiment with swan-neck flasks. These flasks allowed air to enter but trapped dust and microorganisms in the neck. He boiled broth in these flasks to kill any existing life.
* The Results: The broth in the swan-neck flasks remained sterile for long periods, even with air exposure. When the neck was broken, the broth quickly became contaminated. This showed that the microorganisms in the air were the source of contamination, not spontaneous generation.
* Conclusion: Pasteur's experiment provided strong evidence against spontaneous generation and helped to solidify the idea that living organisms come only from other living organisms (biogenesis).
