A foot believed to belong to a British climber who went missing 100 years ago has been found on Mount Everest, in a discovery that may solve one of mountaineering’s biggest mysteries.

Andrew Comyn “Sandy” Irvine had attempted to climb Everest in June 1924 with his partner George Mallory when the pair vanished. While his partner’s remains were eventually retrieved, Irvine’s body was never discovered.

But last month a team of climbers filming a National Geographic documentary stumbled on the foot, revealed by melting ice on a glacier.

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But the filmmaking team is fairly confident it belongs to Irvine, due to the sock found inside the boot being embroidered with the words "A.C. Irvine".

“I mean, dude… there’s a label on it,” Chin was quoted as saying.