Human remains believed to belong to a British explorer Andrew Comyn "Sandy" Irvine who disappeared during his adventure on Everest more than 100 years ago.
He disappeared along with the mountaineer George Mallory in June 1924, and they attempted to be the first people to reach the top of the mountain.
Although Mallory's remains were discovered in 1999, the remains of his friend Irvine, and his Kodak camera that may have recorded a possible historic adventure, were never recovered.
The top of the mountain was officially first climbed 29 years later, when Edmund Hillary and Tenzing Norgay scaled Everest from its south side in 1953.
A team of National Geographic documentary team, including the Oscar-winning director Jimmy Chin and the climbers and filmmakers Erich Roepke and Mark Fisher found remains may belong to Irving foot.
The team found a boot and wearing a sock carried his name, the foot was discovered on Everest's Central Rongbuk Glacier.
Chin told National Geographic: "I lifted up the sock," adding: "and there's a red label that has A.C. IRVINE stitched into it."
Irvine and Mallory were last seen on June 8, 1924.