At some point you'll think, "These people are nuts," and you'll be right. You may find yourself suddenly glad for the little things in life, like sunlight (a big little thing) or above-zero temperatures (equally appreciable). What you might not know is that the lack of these things can drive a person nuts. Or in this case, more nuts. That's the road five guys have chosen as they spend an isolated winter together at the summit of the Greenland...