Through a process of grinding lenses Anton Van Leewenhoek (1632-1723) was able to develop a more reliable compound microscope. This was an incredible breakthrough, due to the fact humankind could now peer into the microscopic world. Leewenhoek’s contributions led to the development of microbiology which added to the body of knowledge of medicine and zoology. The Dutch scientist was running a drapers shop and wanted to see the quality of thread better. The magnifying glasses available to him were inadequate for his needs. Developing glass with higher magnifying power did not just help his business, but allowed him to see a world unknown. Anton Leewenhoek’s observations documented muscle fibers, bacteria, spermatozoa, and the movement of blood through capillaries. After these discoveries, science in 17th century Europe would never be the same.