9. Simulator Sagas: Mars-500 Project
Although not in space, participants in the Mars-500 simulation were sealed from the world for 520 days, facing severe isolation in a confined Moscow module. Crew members described psychological stress, sleep problems, and interpersonal tensions that mirrored what real astronauts endure. The study provided valuable insights into the challenges of long-duration space missions. (pubmed.ncbi.nlm.nih.gov)