This episode is about dirt or, phrased more scientifically, soil. It’s about soil health, soil biodiversity and ecology. It’s a conversation with Dr. Ciska Veen, soil and ecosystems researcher at the Netherlands Institute of Ecology and Dr. Wim van der Putten, who heads terrestrial ecology at the Netherlands Institute of Ecology. (Art: J. Jackson; Music: Jungle Jam by Evert Z, licensed from Artlist.io.)