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