"I'm not like a mom. We're like, wave at each other across like the Antarctic Tundra," he says of his race with another polar explorer. "How much, how skinny can you get? How much can you starve yourself and still make it to the other side?" He didn't change his underwear for 54 days because he'd rather have 100 calories more of food on his sled. 'If you could take 1000 pounds of food with you, you'd make it'