K2, in the Himalayas on the Pakistan-China border, is not as tall as Mount Everest, but it is far more dangerous. Many more people die attempting to summit K2 than they do on Everest. More than 4,000 people have climbed Everest, compared to the less than 350 who have reached the peak of K2.
So when Polish daredevil Andrzej Bargiel reached the top of the mountain without the aid of supplementary oxygen, that was an impressive feat unto itself. That wasn’t enough for Bargiel, though. He went back down the 28,000-foot mountain on skies, the first person ever to do so.