Exploring the South Pole in Winter - Sir Ranulph Fiennes

Called the world's greatest living explorer, Sir Ranulph Fiennes has crossed both poles, climbed Everest and raced deserts. As he has aged, his expeditions grew no less challenging. Currently, his team is attempting to make the first winter crossing of Antarctica in The Coldest Journey. Finnes explains why we need to go to the world's most extreme polar climates to see what's there before it changes forever from the pressures of climate change.