* Data centres range from vast warehouses in Iowa to a converted paper mill in Finland * Buildings are so large Google even provides bicycles for engineers to get around them * Street View tour of North Carolina facility reveals Stormtrooper standing guard Google has given a rare glimpse inside the vast data centres around the globe that power its services. They reveal an intricate maze of computers that process Internet search requests, show YouTube video clips and distribute email for millions of people. With hundreds of thousands of servers, colourful cables and even bicycles so engineers can get around...