Dr Helen Farr is leading a team looking at prehistoric wrecks in the Black Sea.
The Bavarian Soviet Republic with Volker Weidermann
Dan chats to Volker Wiedermann, a German writer and literary critic, about the Bavarian Soviet Republic. The Republic, established in the aftermath of the First World War, was an unlikely formation and was quickly attacked from all sides, especially as it tried to propagate radical ideas about government. Discover more history interviews and documentaries at