They devoured fresh-picked tropical fruits, vegetables and a fluffy egg strata after eating mostly freeze-dried food during their isolation.
The crew of four men and two women are part of a study designed to better understand the psychological impacts a long-term space mission would have on astronauts.
The data they produced will help NASA select individuals and groups with the right mix of traits to best cope with the stress, isolation and danger of a two-to-three year trip to Mars. The US space agency hopes to send humans to the red planet by the 2030s.
While isolated, the crew members wore space suits and travelled in teams whenever they left their small dome living structure. They ate mostly freeze-dried or canned food on their simulated voyage to Mars.
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All of their communications with the outside world were subjected to a 20-minute delay the time it takes for signals to get from Mars to Earth. The crew was tasked with conducting geological surveys, mapping studies and maintaining their self-sufficient habitat as if they were actually living on Mars.
"There are certainly human factors to be figured out, that's part of what HI-SEAS is for," Lark said in a video message recorded within the dome. "But I think that overcoming those challenges is just a matter of effort. We are absolutely capable of it."
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