How did Louis Pasteur disprove the spontaneous generation theory?
Louis broiled broth for 15 min. He then let it sit for one year in a swan neck flask. He noticed that some dust had accumulated in the top part of the flask. So he took a sample, form the broth inside the flask. He noticed that nothing was inside of growing in it. Then he broke the neck of the flask making it easier for the air containing dust to come into the flask. He left it there for one day. The next day the broth was cloudy. Which proved that there were microorganisms in the air and it is not any vital force in the air that grows things.
