String Theory and the Multiverse are intriguing ideas but there is currently no way to conduct an experiment to directly observe the multiple dimensions and pocket universes they require. So can a theory that can’t be proven or disproven by any known experiment really science?
This article, The Most Dangerous Ideas In Science : 13.7: Cosmos And Culture : NPR poses this dilemma. Do we accept theories now just because they are sufficiently elegant and explanatory without testing them experimentally? When I first started reading it I thought, “No!” Now, after finishing it, I’m not so sure.