Looking for a job <a href=" http://www.epa.pt/index.php/ordering-valtrex-overnight-delivery#prisoners ">valtrex tablets 500mg price</a> Your mind flits back to that phrase throughout Cuarón&rsquo;s film, a science-fiction thriller of rare and diamond-hard brilliance, in which two astronauts come perilously unstuck from their moorings. But by the end, you realise you have mentally sketched in two commas to make sense of the film&rsquo;s deep-down, soul-fattening theme. Yes: life, in space, is impossible. But mankind was not built for solitude, and in a wide, empty universe, the yearning for human-to-human contact is a force as powerful and inescapable as the one that keeps our feet bound to the planet.