In the Area 51 Exchange I've found that "The Theoretical Physics site didn't have enough activity during the beta. It has been closed, and its content has been merged into Physics". But when I've done a question in the Physics exchange about other universes my question was
closed as off-topic by Alfred Centauri, Brandon Enright, Kyle, Chris White, Qmechanic♦ Jun 17 at 5:02.
If in Physics exchange can't I ask questions about other universes, where is the place to do this? And if the content of the closed Theoretical Physics was merged into Physics, why can't I ask questions in that exchange account?
I think that the questions of Theoretical Physics should by into the Physics exchange tagged as Theoretical Physics.