our aim is to get to ariz, our base, where we will be spending the night.ts to mars will also have to live underground in caves or lava tubes to avoid interstellar radiation. and there's no time to waste on the experiments. ok, so i'm collecting some samples of the water that's trickling from above, it's really quite cool. one of the goals is to extend the stays in the cave to see how people cope. very soon, we'll need teams of scientists and engineers and people from all areas of knowledge and science, spending one month, several months, more than a year in this station. more than a year? wow. when you're talking about isolating people for several months, or more than one year, there are so many things that come in that would be so useful for future space exploration. this experience isn't cheap. for non—scientists, it's about £5,000 for the 30—day experience, which includes preparation, training and about three days in the cave... ..i mean mars. so this is where i'm sleeping tonight. it's the top bunk of a bunk bed. i've not been in the top bunk since i w