Four Americans Walk Out of NASA's Fake Mars Box After 378 Days Locked Inside
A NASA crew just spent more than a year sealed inside a 3D-printed 'Mars' habitat in Houston — rationed food, fake spacewalks, 22-minute message delays and all — before finally stepping back into real daylight this weekend.
Four volunteers walked back into daylight at NASA's Johnson Space Center in Houston on Saturday after spending 378 days locked inside a 1,700-square-foot 3D-printed box designed to feel exactly like Mars — right down to the simulated spacewalks and the 22-minute lag on every message home.
The crew — commander Ross Elder, an Air Force experimental test pilot; medical officer Ellen Ellis; science officer Matthew Montgomery; and flight engineer James Spicer — entered the habitat, known as Mars Dune Alpha, on October 19, 2025, kicking off the second mission in NASA's CHAPEA program (Crew Health and Performance Exploration Analog). They did not leave the building that houses the structure for more than a year, except for staged "Marswalks" in spacesuits.
A Year of Fake Mars, Real Isolation
Inside, the volunteers lived with deliberately engineered hardships: rationed supplies, simulated equipment failures, and communication delays built to mimic the real gap between Earth and Mars, according to AccuWeather. They also grew their own crops, exercised daily and carried out habitat maintenance and robotic-operations tasks meant to mirror a real Red Planet outpost.
The findings are meant to shape how NASA designs vehicles, habitats and health protocols for an actual multi-year trip to Mars.
NASA's own media advisory laid out the exit ceremony in granular detail: a livestream beginning at 3 p.m. Eastern on October 31, with Johnson Space Center Director Vanessa Wyche and NASA astronaut Jack Hathaway speaking before the four crew members stepped outside for the first time in more than a year. The crew now heads into roughly two weeks of post-mission medical and psychological evaluation before results are compared against data from the program's first mission.
That first CHAPEA mission wrapped in July 2024, when a different four-person crew — led by research scientist Kelly Haston — emerged from the same habitat after its own 378-day stint. A third and reportedly final CHAPEA mission is expected to follow in the years ahead as NASA builds its case for sending real astronauts to Mars sometime in the 2030s.
For now, Elder, Ellis, Montgomery and Spicer get something their simulated Martian counterparts won't for a long time yet: fresh air, real sunlight, and a phone call that doesn't take 22 minutes to connect.