Mount Everest explorers George Mallory and Sandy Irvine bravely attempted to climb the world’s highest peak on June 8, 1924. It was the third attempt of the British to try to achieve the first ascent to the mountain. Unfortunately, they disappeared and was never seen again. They had been spotted high on the mountain that day but disappeared in the clouds. It wasn’t until 1999 that Mallory’s body was found but it didn’t provide clues or evidence as to whether they were able to reach the summit.