Historically, scientists largely disregarded tree canopies, focusing instead on the lower parts of trees. In the mid-1980s, ecologists began exploring canopies, discovering they teemed with life, akin to tree gardens. This episode, originally released in 2022, delves into these "forests above the forest." The story explores the secret powers of these sky gardens revealed by Korena Mafune's research. It also highlights Nalini Nadkarni's groundbreaking discoveries about tree capabilities. The episode features arboreal surprises, including a cameo from a retired host. The episode's source material includes a video showcasing canopy research and conservation efforts. Listeners are encouraged to sign up for the newsletter and support Radiolab through membership. People were encouraged to follow the show on social media and provide feedback via email and a survey. Support for the show comes from listeners and various foundations.