I am reading the book he wrote on his 1-year in space, very good and not too technical. It was distressing to read the pain he was in when he returned on earth, couldn’t sleep or be in bed. A lot of changes happen in their bodies, in my opinion they are very courageous going knowing how they will be affected, true pioneers. Wish both brothers the best, even if I don’t agree with their politics.
I think this is what led to some upset by the first generation of astronauts. They had put their lives and health on the line for scientific advancement and exploration but the ball was dropped and they never got to see farther exploration based on their journeys.