I'm reading "The Universe in your hand" by Christophe Galfard (great book, easy to read and covers everything science knows about the big and the small and then some), and there are 4 types of multiple universes theories all following extrapolations from real physics or mathematics. I'd recommend reading that to better decide for yourself how scientific you believe it is.
aiolive t1_j4csbee wrote
Reply to The multiverse by Manureofhistory
I'm reading "The Universe in your hand" by Christophe Galfard (great book, easy to read and covers everything science knows about the big and the small and then some), and there are 4 types of multiple universes theories all following extrapolations from real physics or mathematics. I'd recommend reading that to better decide for yourself how scientific you believe it is.