"There is no colder part of the Earth than the surface of the Antarctic icecap in winter." —AccuWeather.com expert senior meteorologist Jim Andrews
No one has ever attempted to cross Antarctica on foot during winter, when temperatures can dip below -120 degrees Fahrenheit. At the ripe old age of 68, 25 years after he said such an expedition was impossible, Sir Ranulph Fiennes said he will be the first to try. We've listed all of his reasons for going below, along with the rest of the details about the quest he is calling The Coldest Journey.