A NASA mission meant to test how living on Mars would stress and test a human crew ended on Saturday, with four volunteers emerging from more than a year in a 1,700-square-foot structure. A NASA mission meant to test how living on Mars would stress and test a human crew ended on Saturday, with four volunteers emerging from more than a year in a 1,700-square-foot structure. NBC News Science
Four volunteers, 378 days: NASA completes first mission simulating astronaut life on Mars
