The Great ExplorersWhat inspires explorers to push back the boundaries of the known world? Why do they risk their lives in unforgiving conditions far from home? How do they survive at the limits of human endurance? Who are the great pioneers of land, sea and space? Where next? The Great Explorers charts the great expeditions of forty of the world's most intrepid explorers, from da Gama to Gagarin. Gertrude Bell plotted the desert sands, politics and poetry of Arabia;