Our guest today is Mary Roach, a science writer who’s often drawn to taboo, or simply squeamish subjects, like sex, cadavers, or the digestive process. In books like Stiff, Bonk, Gulp, and Packing For Mars, Roach teaches her readers about the human body as well as basic – and not so basic – scientific concepts. It’s science through storytelling – and humor. On July 28, 2025. Roach came to KQED’s studios in San Francisco to talk about her new book, Replaceable You: Adventures in Human Anatomy, with journalist Alexis Madrigal, the co-host of KQED’s Forum.