Peter Hudson is an author and agricultural development worker. His recent book, Under an African Sky, describes repeated journeys over twenty-five years to a single village in Mauritania and his efforts to bring relief to people suffering from climate change
Tom Morgan organised the first Mongol Rally from the UK to Mongolia. The rally has three conditions: the car must be small and rubbish, teams must be unsupported, and they must raise £1,000 for charity
Greg Lindsay is an urbanist and journalist whose books include Aerotropolis, an examination of how airports have become the central hub for cities. His forthcoming book, Engineering Serendipity, looks at the role serendipitous encounters play in economics.
Suren Gazaryan is a Russian environmental activist and winner of this year’s Goldman Environmental Prize. After leading campaigns to expose government corruption and illegal use of protected forest along Russia’s Black Sea coast, he had to flee to Estonia to avoid arrest
David Harvey is one of the world's most influential geographers. After studying geography at the University of Cambridge, he moved to the USA, where he developed the interest in Marxism that has shaped his career
Ramita Navai is a British–Iranian journalist and broadcaster. Her first book, City of Lies: Love, Sex, Death and the Search for Truth in Tehran, details the extraordinary stories of the ordinary people she met in southern Tehran
Sir John Houghton is a Welsh climate scientist. He was professor of atmospheric physics at the University of Oxford; a key member of the IPCC; founder of the Hadley Centre; and chief executive of the Met Office
Lucien Castaing-Taylor is a filmmaker and artist, and director of the Sensory Ethnography Lab at Harvard University. His latest work, Leviathan, co-directed by Véréna Paravel, immerses viewers in life aboard US fishing trawlers