We've all seen the long lines leading to Mt. Everest. This is especially true in the notorious “Death Zone” near the summit, where the lack of oxygen and long delays have proved fatal, leaving hikers to die numb from frostbite in the subzero conditions.

Nepal will issue Everest permits only to climbers with experience of scaling at least one of the Himalayan nation’s 7,000-meter (22,965 ft) peaks, according to the draft of a new law aimed at reducing overcrowding and improving safety.

An expedition is planning to take clients up the world's tallest mountain in record time with xenon gas. But some in the climbing and medical world worry it is an unnecessary gamble.