The Douglas Mawson Antarctic Expedition of 1912 is considered one of the most amazing feats of endurance of all time. Although his two companions perished, Douglas Mawson survived, but how?  In a bold historical experiment, scientist and adventurer Tim Jarvis is retracing the gruelling experience, with the same meagre rations, primitive clothing and equipment to uncover what happened to Mawson physically — and mentally — as a man hanging on the precipice of life and death.