Explore groundbreaking physics experiments that transformed the world in this captivating lecture by physicist Suzie Sheehy. Delve into the fascinating history of 20th-century physics discoveries, many of which occurred at the Royal Institution. Learn about Wilhelm Röntgen's X-ray discovery, J.J. Thompson's work on electrons, and Harriet Brooks' contributions to radioactivity research. Discover the origins of cosmic ray detection, cloud chamber technology, and early particle accelerators. Gain insights into the emergence of big science post-World War II and the role of women in advancing particle physics. Through engaging stories, demonstrations, and historical context, understand how laboratory experiments have profoundly impacted our understanding of the universe and shaped modern life.