I will not squint to a almost not seen cup. What is the Vapor Trail. Look, we started with the Big Bang, and we will all demise after the Big Crunch, when the Universe collapses into itself. Field Theory. The Vapor is that remain of what has happened that is stil in a place also seen by the big eyes of space telescopy. It is a Quantum Field concept that states this. The universe has a kind of memory, from the Big Bang to there very here and now. How.