We go above and below, at every depth. Tessa Hill joins Suzanne Lang in conversation on At Every Depth, Our Growing Knowledge of the Changing Oceans, the book she wrote with science writer Eric Simons that takes readers from the shore to the ocean depths, from the tropics to polar regions, and introduces us to people who are working hard to save our oceans and the habitats that host so much life. Also featured is a conversation with Marianna Leuschel and Josie Iselin, co-directors of Above/Below, an ocean literacy campaign that has created a webstory, The Mysterious World of Bull Kelp , online at https://bullkelp.info . It's A Novel Idea with Suzanne M. Lang. Streaming and podcasting at KRCB.org .