Sir Ranulph Fiennes is considered one of Britain's greatest explorers, but at 68 you would forgive him for wanting to take it easy.
Instead, he will be literally ‘chilling’ on a six-month voyage across Antarctica in temperatures dropping below minus 90 Celsius.
Fiennes' is a mission with a scientific purpose, to study the effects of climate change on the Antarctic's ice.
Al Jazeera's Simon MacGregor Wood reports from London.
