During World War I, a group of young women known as the “Radium Girls” worked in watch factories, using radioactive radium paint to create luminous watch dials. Tragically, these women began falling ill with mysterious and horrific symptoms. Their bodies literally decaying from within due to radium poisoning. Despite the company’s insistence that the paint was harmless, the mounting evidence proved otherwise. This presentation will explore the courageous fight of the Radium Girls against corporate denial and negligence. Their legal battle not only exposed the dangers of radium but also led to groundbreaking changes within the workplace safety. The Radium Girls’ tragic experiences significantly advanced our understanding of radium’s effects on the human body, paving the way for crucial scientific discoveries in radiation health.