Avengers: How Endgame exploits time travel and quantum mechanics

Many of the time-travel concepts in Endgame are connected, at least in name, to recent scientific theory, simulation and speculation

At the end of Avengers: Infinity War half the people (including heroes and villains) in the universe were gone in the snap of a finger from Thanos (Josh Brolin).

So how can Avengers: Endgame (in cinemas from this week) try to bring them back?

Well, with that tried and tested movie plot device: time travel. Plus a surprising amount of scientific jargon thrown in, including quantum mechanics, Deutsch propositions, eigenvalues and inverted Möbius strips.

But don’t think that everything you hear during the movie was