Extreme skier, Andrzej Bargiel, became the first person to ski down Mount Everest without additional oxygen on Tuesday, Sept. 23. The achievement was documented in impressive footage.

Green Boots is one of the famous markings that is used by climbers as a marking during their path to the top. As per the name, it is a pair of bright green boots underneath a caved area on the mountain, but those boots are being worn by a man who has been stuck on Everest for nearly twenty years.

After striking out five times on the world’s highest peak, an American ultrarunner is questioning the feasibility of breaking the fastest known time from Nepal