In this photo provided by the University of Hawaii, six carefully selected scientists entered a geodesic dome called Hawaii Space Exploration Analog and Simulation, or HI-SEAS, located 8,200 feet above sea level on Mauna Loa on the island of Hawaii, Thursday, Jan. 19, 2017. The four men and two women moved into their new simulated space home Thursday afternoon, as part of a human-behavior study that could help NASA as it draws up plans for sending astronauts on long missions to Mars. (University of Hawaii via AP)
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