A special edition of Digital Planet recorded at the BBC Radio Theatre in London to celebrate the programmes 18th birthday. The team look back on the first show and look forward to the tech that is now also coming of age and what we might be seeing in the future. With 3D holographic phone calls, musical performances where the musicians are hundreds of kilometres apart, and the Gravity Synth detecting gravitational waves and turning them into music.Picture: Digital Planet recording, Credit: BBC