On April 30, 1897, British physicist J.J. Thomson changed the course of science by announcing the discovery of the electron, a fundamental component of the atom. This monumental discovery challenged the prevailing atomic model and laid the groundwork for the development of quantum physics, ultimately revolutionizing our understanding of the natural world and leading to advancements in technology, medicine, and energy. Thomson’s work not only unveiled the intricate structure of matter but also opened infinite possibilities for exploring the universe at its most fundamental level.