Readers curious about the science behind science fiction may want to give the Flash Forward podcast a listen. This podcast's tagline is "possible & not so possible futures," and that's exactly what listeners will find. Each episode offers an in-depth exploration of a different future scenario. Some of these are extremely speculative, such as what would happen if space pirates suddenly dragged a second moon into Earth's orbit, while others engage with issues facing the world today, such as genetic editing and CRISPR technology. Currently in its fifth season, Flash Forward is hosted and produced by Rose Eveleth, a journalist with a background in ecology. Episodes are generally about an hour long and frequently include fascinating guests such as space archaeologist Alice Gorman, The Atlantic's science writer Sarah Zhang, and planetary volcanologist Tracy Gregg. Listeners can stream episodes of Flash Forward online (where they can also view the show notes), and those interested can also subscribe via platforms such as Spotify and Apple Podcasts or by RSS feed.