When it comes to space exploration, you are probably right: robots not only do not suffer from all manner of psychological troubles, but they can also do a better job in space (“Cosmic Mood-Swings,” June 30, 2007). There is more to space than exploration, though. Although the chances of space colonization seem to be drooping now, they have not vanished yet. And this is where human psychology will have to be mastered so as to allow for much more than interplanetary travel. Interstellar travel beckons, too. As many masters of science fiction have known for about a century, the tedium of space travel can be tackled by a myriad of clever devices, some of which would be perceived by the bureaucrats in the American and European space agencies as outright loopy. Sadly, you take their stilted view rather than letting your imagination soar with the best among the science-fiction writers.