Scientists have been concerned about the effects of climate change on the ocean for decades, but the task of measuring that change proved a major challenge. Walter Munk (APS 1965)—the Einstein of the oceans—had an idea. Tune in to The Heard Island Experiment, a special podcast series with APS CEO Patrick Spero, to learn about the development of a new technology that could improve the world, a grand scientific adventure to prove it could work, and its unexpected and turbulent legacy. Episode Website: https://www.amphilsoc.org/heard-island- experiment