Ranulph Fiennes

Ranulph Fiennes, author of Shackleton: The Biography, is the only man alive ever to have traveled around the Earth's circumpolar surface. His record-breaking expeditions include travel by riverboat, hovercraft, man-haul sledge, skidoo, Land Rover, and skis. He is often described by media as "the world's greatest living explorer." When not on one of his adventures, he lives in Britain.