Team member during the expedition to find Sandy Irvine's remains on Mt. Everest, in attempt to solve one of the mountain's greatest mysteries: who was the first to summit Mt. Everest? (National Geographic/Matt Irving)
One of the team members from the 'Lost on Everest' expedition to find Andrew Sandy Irvine's remains on Mount Everest. National Geographic / Matt Irving

'Lost on Everest' attempts to solve mystery of whether two British men scaled summit in 1920s