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The Library of Lost Maps by James Cheshire, Professor of Geographic Information and Cartography, tells the story of the discovery of a treasure-trove at the heart of University College London. In a long-forgotten room James found thousands of maps and atlases. This abandoned archive reveals how maps have traced the contours of the world, inspiring some of the greatest scientific discoveries, as well as leading to terrible atrocities and power grabs. But maps have not always been used to navigate or reveal the world, according to a new exhibition at the British Library on Secret Maps (from 24 October 2025 to 18 January 2026). Jerry Brotton, Professor of Renaissance Studies at Queen Mary University of London, and author of Four Points of the Compass, explains how mysterious maps throughout history have been used to hide, shape and control knowledge. The biographer Jenny Uglow celebrates a different kind of mapping in her new book, A Year with Gilbert White: The First Great Nature Writer. In 1781 the country curate Gilbert White charted the world around him – from close observation of the weather, to the migration of birds to the sex lives of snails and the coming harvest – revealing a natural map of his Hampshire village.Producer: Katy Hickman Assistant Producer: Natalia Fernandez

Of the 7,000 languages estimated to exist, half will have disappeared by the end of this century. That’s the stark warning from the Director of the Endangered Languages Archive, Mandana Seyfeddinipur. The evolution of languages, and their rise and fall, is part of human history, but the speed at which this is happening today is unprecedented. Mandana will be appearing at the inaugural Voiced: The Festival for Endangered Languages at the Barbican in October. A sense of loss also runs through Sverker Sörlin’s love letter to snow. The professor of Environmental History in Stockholm writes about the infinite variety of water formulations, frozen in air, in ‘Snö: A History’ (translated by Elizabeth DeNoma), and his fears about the vanishing white landscapes of his youth.In the Arctic the transformation from frozen desert into an international waterway is gathering pace. Klaus Dodds is Professor of Geopolitics at Royal Holloway, University of London and with co-author Mia Bennett sets out the fight and the future of the Arctic in ‘Unfrozen’. While territorial contest and resource exploitation is causing tensions within the region, there is also potential for new ways of working, from Indigenous governance to subsea technologies.Producer: Katy Hickman Assistant Producer: Natalia Fernandez

The economist Yanis Varoufakis found himself in the eye of the storm as Greece’s Minister of Finance in 2015, at the height of the country’s debt crisis. Now he reflects on his political awakenings and the women who influenced him in Raise Your Soul. It’s a family story that starts in Egypt in the 1920s and traces Greece’s tumultuous century through Nazi occupation, civil war, dictatorship, socialism and economic crisis. The historian Professor Mary Vincent focuses on the Spanish Civil War and has written about fascism, political violence and its impact on the people. She sees both similarities and stark differences between the Greek and Spanish Civil Wars and ponders the question of how global politics influence what happens in nation states.As a new translation of Thucydides’s The History of the Peloponnesian War (by Robin Waterfield) is published, the classicist Professor Paul Cartledge explains why this ancient text has remained essential reading for military leaders and politicians for centuries. Thucydides’s account of the war between Athens and Sparta that began in 431 BCE depicts the devastation of civil war and reflects on the nature of political power.Producer: Katy Hickman Assistant Producer: Natalia Fernandez