Today NASA is showing the real science behind the film "The Martian". Not just the bits and pieces you'll know already - space travel and all that - but the technology you might not have known exists. NASA has the technology to make MOST of what you'll see in The Martian a reality. All they need is time and funding. And Matt Damon, of course. Can't forget Matt Damon. And Ridley Scott. This all begins with "the Hab", or The Habitat, the place where our hero Watney spends his days in the film.