DVDs are set to explore new dimensions.Punchstock Spreading into extra dimensions could help next-generation DVDs to store even more data than they currently do. The new technique could squeeze around 140 times the capacity of the best Blu-rays into a standard-sized disk. Traditional DVDs and Blu-ray disks store data in two dimensions, and there's been a recent push to increase their capacity by creating multi-layered disks that store data across three dimensions. But, asks James Chon at the Swinburne University of Technology in Melbourne, Australia, why stop there?Chon and his colleagues are stepping into hyperspace, by encoding information in two...