Spanning five countries, the Himalaya is home to peoples who have adapted to living in the harshest of conditions. Journalist and broadcaster Ed Douglas, author of the first major history of the Himalaya has been visiting these remote communities for 30 years. Now they are opening up to him about the challenges of living on the roof of the world. Ed's friends from the Sherpa and Rai groups in Nepal reveal how genetically and practically they have evolved to be able to live long term at such altitudes and how seismic political and economic shifts in lands far below are forcing fundamental changes in their way of life up above. Ed also reveals the often overlooked cultures and achievements of the diverse ethnic groups that make up this region including interviews with artists, musicians and record breaking athletes. Presenter: Ed Douglas Producer: Clem Hitchcock A Just Radio Ltd production for BBC World Service (Photo: A Nepali woman in the mountains. Credit: Dinesh Deokota)