Science fiction’s visions of multiple universes differ from the real theory Science Photo Library / Alamy
The following is an extract from our Lost in Space-Time newsletter. Each month, we hand over the keyboard to a physicist or mathematician to tell you about fascinating ideas from their corner of the universe. You can sign up for Lost in Space-Time for free here.
Imagine passing through a mysterious portal and encountering a version of yourself as you would have wished to be. Instead of taking up that tedious job at the accountancy firm, you followed your dreams and became a rock…
