A group of six people bade the rest of the world farewell on Friday to begin their year-long stay in a cramped dome on Hawaii's Mauna Loa volcano. The French astrobiologist, German physicist and American pilot, architect, doctor/journalist and soil scientist went on a voluntary isolation to simulate a manned mission to the red planet, which could last from one to three years. The team will have to endure living together in a 36-foot-wide, 20-foot-tall abode called HI-SEAS, short for Hawaii Space Exploration Analog and Simulation. They do have (tiny) rooms of their own with enough space for a sleeping cot and a desk, but they can only go outside if they're wearing a spacesuit. All six also won't have access to comfort food if they're feeling stressed from their living situation: they have to make do with basic food items like canned tuna and powdered cheese.