The Moon Diver mission concept proposes to send the JPL-developed Axel extreme terrain rover into one of these pits, rappelling down the wall to expose the history of the lunar mare, and to illuminate the workings of the flood basalt eruptions that created them: eruptions on a scale never before witnessed in the history of humankind. This lecture was presented by Dr. Laura Kerber at the Keck Institute for Space Studies on April 2, 2018.