Fungi are recyclers. They break down dead organisms so the matter in those bodies can become the building blocks for new organisms. A new film screening in Denver explores the symbiotic relationship between humans and mushrooms. Director Louie Schwartzberg has made documentaries about the winged creatures and the unseen world for Disney and National Geographic. His latest documentary, "Fantastic Fungi," continues that theme of making the invisible world visible. It’s showing at the Sie FilmCenter until Oct. 3.