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Are moving images taking over from still ones? And, if they are, are we losing the ability to focus on pictures that don't leap about? Online it's an all-dancing, all-singing world of video-clips and animated commercials. On the London Underground, moving digital-panels are replacing advertising posters. Contemporary art frequently involves video or performance or motion of some kind. The Strand debates the merit of still vs moving with the curator William Ewing and the neuroscientist Kristine Krug.

How can a modern composer make a 300 year old piece of music - that everybody knows - sound new and 21st century? Max Richter has recomposed Vivaldi's Four Seasons

Photo: Frederick J Brown/AFP/Getty Images