Stalin's last terror campaign against the best Soviet doctors, Castro's triumphant entry into Havana, the extraordinary story of how a destitute single mother produced a best selling memoir about her life in a Brazilian favela. Also, the controversy over 'Fat Is a Feminist Issue', and the world's only seed vault.

Photo: Yakov Rapoport, one of the few survivors of Stalin's 'Doctors' Plot'. Credit: family archive.