Back in the days before smart phones with GPS functions became ubiquitous we had maps. Remember how hard it was to fold them? Mathematicians feel your pain; they have struggled with map folding problems for generations. But a recent insight by a maths student suggests there might be another way to approach these problems, one that makes an unlikely connection between combinatorics, origami and engineering.
This podcast comes to you from a conference on the nature of time. We talk to philosophers of physics Jeremy Butterfield and David Wallace, as well as the eminent Roger Penrose about the puzzle time poses to physicists and what it has to do with the Big Bang and the second law of thermodynamics.