The physics of time travel isn't just the stuff of science fiction
We're all time travelers nowadays. We project ourselves mentally into the misty past and the risky future. We revisit and revise our memories. We invent possible futures and explore them with anticipation and desire. We're temporal experts and manipulators; we have flashbacks and flashforwards and stop motion and instant replay and time gates and time shifting and time forks. Not content with nostalgia for the past that never was, we begin to feel nostalgia for futures that will never come.
We time travel in our imaginations. We time travel in our storytelling. But we still want more. Would an actual time machine be too much to ask for? Can't science come to our aid?
31st October 2017