On June 25, four crew members will suit up and embark on a Mars mission, living for an entire year in a small 3D-printed habitat with only each other for company. But these space explorers won’t leave Earth. Their simulated Martian environment is contained in a large hangar at NASA’s Johnson Space Center in Houston, and it’s designed to test the psychological and social challenges that will confront early visitors to the Red Planet, where remoteness and the harsh terrain will make life formidable.
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