It was an archaeological discovery in Egypt that was to revolutionise our attitudes to the Ancients. More than half a million documents - which included not only the lost works of Greek literary giants such as Homer, Sophocles and Sappho, but also records of daily life - offered a unique peak into a lost world. Last year, a century after they first came to light, cutting-edge technology developed by Nasa helped reveal some of the most significant finds to date.