A polar explorer by trade, he's logged nearly a dozen excursions over the last two decades, tallying up to over a year spent in sub-zero temperatures and nearly 4,000 miles trekked across frozen landscapes.

Although Saunders has accomplished a lot over the years (like in 2004 when he became the youngest person to ski solo to the North Pole), perhaps most impressive is the Scott Expedition. Between October 2013 and February 2014, Saunders and partner Tarka L'Herpiniere completed this 1,795 mile, 108-day cross-Antarctica journey on foot. Following the course of Captain Robert Falcon Scott's ill-fated 1911-1912 expedition (the entire crew perished attempting the treacherous route), the pair set out from the coast, eventually arriving at the South Pole to turn right around for the return journey. Although they had to call for a resupply on day 70, a decision that Saunders counts among his most difficult ever, this marked the longest human-powered polar journey in history.