简介：Each year, more than 1,000 mountain climbers venture to Denali National Park in Alaska and attempt to reach Mt. Mckinley's summit, the highest point in North America. Nearly half of those adventurers fail, and several die trying-even some of the mos
简介：In late 1914, Sir Ernest Shackleton set forth for Antarctica with 27 men, determined to be the first man to cross the continent from coast to coast. His ship, the Endurance, became trapped in pack ice just short of the continent. When the ice crushed thei