A special edition from the city that's venturing into the future with Expo 92 - the last world fair of the 20th century. Here the programme discovers how the letters Columbus sent home are now travelling to
America at the speed of light, and why birds could stop flying north if tourists keep flooding south. It unearths the secrets of a buried Roman town - without digging it up. And finds that 1,000-year-old traditional courtyards are making a comeback - in buildings made with walls of water and an avenue of 90ft fridges. Plus a look at the high-speed trains that will get visitors to Expo, the research that may eventually stop them getting stuck in traffic jams and the system that helps them get around the exhibition, just by pointing. But will all that Expo brings, and leaves behind, be enough to project this ancient cityintothe21stcentury?
With Kate Bellingham , Carmen Pryce and Howard Stableford. Producers Rob Bayly and Sam Roberts Editor Dana Purvis STEREO
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