A lot of our knowledge about science today comes from Louis Pasteur. This famous scientist focused on tiny microbes. In Pasteur’s day, most people did not even know microbes existed. They surely did not understand them. Many people did not believe Pasteur. They thought he was crazy. Still, Pasteur did not throw in the towel. He kept studying microbes. His work led to many important changes. One of these changes was how often we wash our hands. Another change involved how we keep our milk safe to drink. A third change was the invention of vaccines to prevent diseases.
