Louis Pasteur was a great man and scientist

He was one of the most brilliant chemists and one of the first microbiologists. He perfected the microscope so he was able to see bacteria and chemicals that were microscopic at the time. So he knew what very few even knew at the time.
Louis Pasteur (December 27, 1822 - September 28, 1895) was a French chemist and microbiologist renowned for his discoveries of the principles of vaccination, microbial fermentation and pasteurization.