Four Volunteers End NASA’s Second Long-Duration Mars Simulation

NASA's second CHAPEA simulation. The first paragraph identifies the completed experiment as NASA's second CHAPEA mission on Earth.

Clue: A four-person crew has emerged from NASA’s simulated Mars habitat in Houston after 378 days of isolation. Reuters reported that the volunteers exited on October 31, completing the agency’s second Crew Health and Performance Exploration Analog, or CHAPEA, mission. The experiment was conducted on Earth.

To represent a challenge of a distant space mission. The second paragraph says delays represented a challenge of a distant mission.

Clue: The crew entered the 3D-printed facility on October 19, 2025. Their work included growing crops and maintaining the habitat with limited supplies. Delays in communication were used to represent one challenge of a distant space mission.

Take part in two weeks of evaluations and debriefings. The last paragraph says they are expected to take part in two weeks of evaluations and debriefings.

Clue: NASA intends to use health and performance information from the exercise to better understand long-duration missions. The participants are expected to take part in two weeks of evaluations and debriefings after leaving the habitat.