Arguably one of the most Mars-like environments on Earth, the north side of Mauna Loa has been home sweet home to six NASA crew members for the last year. Inside a dome-shaped structure, they were living out the latest in a series of NASA-operated missions designed to inform spaceflight: Operation HI-SEAS, for Hawaii Space Exploration Analog and Simulation. The mission was designed to study the psychological impact of long-term space travel by sticking the crew in a confined environment with the same people. Who would voluntarily sign on for that still isn’t clear, but WIRED checked out the team’s return to normalcy this weekend.