Final answer:
Hans and Zacharias Janssen had nothing to do with discovering the microscope. Antonie van Leeuwenhoek is credited with the discovery of microorganisms using his powerful microscope.
Step-by-step explanation:
According to the information provided, Hans and Zacharias Janssen had nothing to do with discovering the microscope. While they are sometimes credited with inventing the telescope, simple microscope, and compound microscope, there is not enough evidence to confirm their contributions. Robert Hooke, Antonie van Leeuwenhoek, Galileo Galilei, and eyeglass makers in the Netherlands in the late 1500s were all involved in the development and early advances of microscopy. However, it is important to note that Leeuwenhoek is credited with the discovery of microorganisms, including bacteria, using his powerful microscope.