unlike these potential martian voyages, we may think that three years in isolation is a bit bonkers. however, from jeff bezos to buzz aldrin, many are dreaming of trips to, and even living on, the red planet. but lord martin rees, britain's astronomer royal, doesn't actually think that most of us are suited to space. nowhere in the solar system anywhere is as comfortable as the top of everest or the south pole. and so that's why i think the idea of mass emigration is a bit crazy. we have to bear in mind that space is not a place for human beings, except for adventurers, the kind of people who do go to the south pole and top of everest. what do the hera crew think about the experiment? well, we caught up with them, unsurprisingly out in the fresh air, shortly after they left the habitat. you know, we're all very similar. if we had one very extroverted person, maybe