This podcast episode explores the contributions of Lord Kelvin to the understanding of the physical world, as well as the scientific inquiries and discoveries at the end of the 19th century. It discusses the mechanism proposed by scientists like Lord Kelvin to explain the heat and light generated by the sun. The episode also delves into the discovery of X-rays by Wilhelm Roentgen, the enigmatic nature of cathode rays, and the groundbreaking discoveries of Marie Curie in the field of radioactivity. It highlights Marie Curie's remarkable achievements, challenges, and warnings about the dangers of radium. The episode concludes by discussing the connection between science and culture and the societal impact of scientific advancements.