Louis Pasteur made many significant contributions to science, including saving the milk, wine, and beer industry, expanding on the idea of vaccinations, and creating germ theory. He is considered to be one of mankind’s greatest scientists.

Louis Pasteur saved many businesses that used milk, wine, and beer. He thought that a microorganism was in the large vats that the manufacturers used. He thought that because the vats were never cleaned, bacteria was getting into the liquid, and making it spoil. He thought that if he heated it up enough, he could kill the microorganism and still preserve the product. He called it the pasteurization process. Many companies today still use his process to make their products safer.