The scientist who called microbes animalcules was

Antonie van Leeuwenhoek was the first person to observe microorganisms through a microscope in the seventeenth century. He called them animalcules because they looked like tiny animals moving around. His work marked the beginning of microbiology. Later scientists like Pasteur and Koch proved that microbes cause diseases. Leeuwenhoek discovery showed that an unseen world of living organisms exists and it changed the way humans understood life and health.