Marc-André SELOSSE, born March 29th 1968, is professor at Muséum national d’Histoire naturelle (Paris) and Gdansk University, where he leads research teams. He has taught at Universities of Viçosa (Brazil) and Kunming (China), and teaches at Ecole Normale Supérieure, Science Po and Hautes Etudes Commerciales (HEC). His research focuses on the ecology and evolution of mycorrhizas, a symbiosis between soil fungi and roots of most land plants. He was head of the French Botanical Society for ten years and is now president of the Fédération BioGée, member of the French Academy of Agriculture and of the Institut Universitaire de France. He is an editor of three international scientific journals: New Phytologist, Ecology Letters and Symbiosis. He published scientific papers (>230) and outreach papers (>330), as well as popular science books in French (the one on microbiota is tanslated in Polish: Nigdy osono, by Literackie). He is a columnist for Le Point and Médecine/Sciences