At just 18 years old, Nima Rinji Sherpa has achieved a feat that few can even imagine. He has become the youngest person, and one of only about 50, to climb all 14 of the world's "eight-thousanders." These peaks, located within Asia's Himalayan and Karakoram ranges, stand over 26,247 feet (8,000 m) tall. This is above the so-called "death zone," where the lack of oxygen makes it impossible to sustain human life for long.