The video details the history of the electron microscope, focusing on the challenge of overcoming spherical aberration to achieve atomic-level resolution. Early electron microscopes, while groundbreaking, were limited by this inherent lens flaw. A team of scientists, defying established limitations, developed a method using asymmetric lenses to correct aberration, finally enabling clear atomic-scale imaging. This breakthrough revolutionized materials science and other fields. Knut Urban, Max Haider, and Harald Rose made a significant breakthrough in electron microscopy by successfully developing a practical aberration corrector. Here's a breakdown of their achievement: Problem: Electron microscopes, while powerful, were limited by aberrations in their electromagnetic lenses. These aberrations blurred the images, preventing the microscopes from reaching their theoretical resolution limit. Solution: The trio developed a working "aberration corrector." This device, using electromagnetic lenses, effectively compensates for the blurring effects of the main lens aberrations. Impact: Improved Resolution: Their corrector dramatically improved the resolution of electron microscopes. Atomic Level Imaging: It enabled clear imaging of individual atoms, a feat previously impossible due to the blurring. Material Science Advance: This breakthrough had a profound impact on materials science, allowing researchers to study materials at an unprecedented level of detail. Rose conceptualized the idea, Haider built the first prototype, and Urban tested it on a microscope.