Take the plunge into an episode on all things aquatic with Bonnie Tsui, whose new book, Why We Swim, dives into swimming history while offering poetic contemplation on the nature of this physical pursuit. The incredible characters in this book—including an Icelandic fisherman who defied death in the ice-cold sea, a Bay Area-based open water marathoner Kim Chambers, Olympic sprinting phenom Dara Torres, and practitioners of the Japanese nihon eiho tradition—provide the jumping off points for this discursive chat between Tsui and co-host Susie Gerhard.