This podcast episode explores various aspects of hyperbaric medicine and the physiological effects of extreme environments. It discusses the sensory experiences inside a hyperbaric chamber, ethical challenges of studying decompression sickness, dangers of oxygen in extreme environments, effects of oxygen toxicity on the body, differences between blast injuries in water and on land, the phenomenon of spalling, contributions of scientists during World War II to underwater surveillance, the capabilities of hyperbaric medicine, Rachel Lance's research on decompression sickness and military safety standards, and the Apple TV Plus miniseries "Franklin" based on Benjamin Franklin's visit to France. The episode provides insights into the complexities and implications of working in extreme environments and the historical events that shaped our understanding of them.