Misha Glenny explores the world of rare earth metals. In this final episode he hears how Russia's interest in Ukraine might be partially motivated by its huge mineral deposits. Guests: Rob Muggah is a co-founder of SecDev, a Canadian data, science and open intelligence company focused on mitigating risks and strengthening resilience. Dr Samuel Ramani teaches politics and international relations at Oxford University and is the author of two upcoming books on Wagner’s activities. Dr Julie Klinger, Assistant Professor in the Department of Geography and Spatial Sciences at the University of Delaware and author of Rare Earth Frontiers: From Terrestrial Subsoils to Lunar Landscapes. Producer: Ben Carter Editor: Hugh Levinson Sound engineer: James Beard Production coordinator: Janet Staples