backed space psychology research subjects are set to emerge Sunday after eight months of isolation together in a Mars-like habitat on a remote Hawaii Volcano.
The crew of four men and two women were quarantined on a vast plain below the summit of the world's largest active volcano in January.
They have eaten mostly freeze-dried and canned food.
And their communications with the outside world have had a 20-minute delay to mimic the amount of time it would take to communicate from Mars.
The participants are in a study designed to better understand the psychological impacts of a long-term manned mission to space on astronauts.
The U.S. space agency hopes to send humans to Mars by the 2030s.
The data they gathered will help NASA pick crews.