PhysicsHow quantum superposition forces us to confront what is truly real What are quantum particles doing before we measure them? Getting to grips with this century-old debate takes us to the heart of whether there is an objective reality Features
PhysicsMicrowaves seem to experience imaginary time – and now we know how Almost a decade ago, researchers calculated that microwaves can seemingly spend an imaginary amount of time within a material – now an experiment reveals how the phenomenon is perfectly real News