I’ve been studying astronaut psychology since Apollo − a long voyage to Mars in a confined space could raise stress levels and make the journey more challenging
- Written by Nick Kanas, Professor Emeritus of Psychiatry, University of California, San Francisco

Within the next few decades, NASA aims to land humans on the Moon, set up a lunar colony and use the lessons learned to send people to Mars as part of its Artemis program.
While researchers know that space travel can stress space crew members both...