Antonie van Leeuwenhoek (1632-1723)
A Dutch tradesman and scientist who is commonly known as "the Father of Microbiology" and considered the first microbiologist. He is best known for his improvement on the microscope and his contributions towards the establishment of microbiology. Using his own microscopes, he was the first to observe and describe single celled organisms. Leeuwenhoek was also the first to record microscopic observations of muscle fibers, bacteria, spermatozon, and blood flow in capillaries.