The electron microscope was invented in 1931 by Ernst Ruska and Max Knoll, marking a significant leap in microscopy technology. Unlike optical microscopes, it uses a beam of electrons to achieve significantly higher resolution, unveiling details at the atomic level. This innovation revolutionized fields such as biology, medicine, and materials science, enabling scientists to view previously invisible structures. It paved the way for numerous scientific breakthroughs, greatly impacting technology and healthcare advancements.