Question

Who was first man to climb mount everest without oxygen?​

Answer 1

Explanation:

Sometime between 1 and 2 in the afternoon on May 8, 1978, Messner and Habeler achieved what was believed to be impossible—the first ascent of Mt. Everest without oxygen

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Answer 2

Answer:

Messner and Habeler

Explanation:

They achieved the record which was considered to be impossible