Question

Who among the following was the first man to climb Mount Everest without supplemental oxygen? tell in a bit detail. no spam or I'll report...​

Answer 1

Answer:

On 8 May 1978, Reinhold Messner reached the summit of Mount Everest; the first men known to climb it without the use of supplemental oxygen. Before this ascent, it was disputed whether this was possible at all.

Explanation:

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Answer 2

Answer: On 8 May 1978, Reinhold Messner and Peter Habeler reached the summit of Mount Everest; the first men known to climb it without the use of supplemental oxygen. Prior to this ascent it was disputed whether this was possible at all. Messner and Habeler were members of an expedition led by Wolfgang Nairz along the southeast ridge to the summit. Also on this expedition was Reinhard Karl, the first German to reach the summit, albeit with the aid of supplemental oxygen.

Two years later, on 20 August 1980, Messner again stood atop the highest mountain in the world, without supplementary oxygen. For this solo climb, he chose the northeast ridge to the summit, where he crossed above the North Col in the North Face to the Norton Couloir and became the first man to climb through this steep gorge to the summit. Messner decided spontaneously during the ascent to use this route to bypass the exposed northeast ridge. Prior to this solo ascent, he had not set up a camp on the mountain.