This is a biography of Rosalie Bertell, a scientist and eco-feminist, focusing on her life's work exposing the health hazards of radiation and nuclear technology. The text details Bertell's career, from her early mathematical and scientific achievements to her activism against nuclear power and weapons. It highlights her research on the effects of low-level radiation, her involvement in numerous high-profile cases, and her advocacy for safer standards. Bertell's outspoken criticism of the nuclear industry and its practices led to significant conflict, yet she received international recognition for her work. The biography also explores her personal life and spiritual journey, emphasizing her dedication to social justice and environmental protection.