Volunteers spend 378 days in Mars simulation YouTubeNASA Invites Media to Crew Completion of Yearlong Mars Simulation NASA (.gov)NASA’s Second Year-Long Mars Simulation Mission Ends Today EngadgetFour volunteers just finished a year in isolation in Houston, all in the name of space exploration KHOUThey spent more than a year inside a NASA hangar in Houston simulating life on Mars. Now, they’re finally out Houston Public Media