Hana Lee Goldin writes: “More than half a billion people around the world now listen to podcasts, across more than 4 million shows. Buried in that catalog is a kind of source material that barely existed a generation ago: experts talking about their own work, at length and in their own words. The clearest proof that podcasts already work as sources is how often we quote them. Each repetition runs on memory alone. So the archive is already in use as a source, just without a way back to the moment.”