Input (grade 13): On 29 May 1953 at the age of 33, he and Sherpa mountaineer Tenzing Norgay became the first climbers known to have reached the summit of Mount Everest â "see Timeline of climbing Mount Everest.
Output (grade 6): Along with Sherpa guide Tenzing Norgay, he was the first successful person to climb Mount Everest on May 29, 1953. Mount Everest is the tallest mountain on earth.