How would a time machine work? Physicists have been engaging the question for decades — and building theoretical frameworks to make it happen. From designs like the Tipler Cylinder, to the paradoxes that imply time travel's improbability, how close are we really to folding the fabric of space-time back on itself… and breaking free from the constraints of time as we know it? This episode originally aired in November 2022.Learn more about your ad choices. Visit podcastchoices.com/adchoices