What does the term “multiverse” refer to?

Which theory in physics most commonly introduces the idea of multiple universes?

What is a “parallel universe”?

In cosmology, inflation theory may lead to which concept?

Which scientist suggested that black holes might create new universes?

Which particle’s behavior is often connected with multiverse ideas in quantum physics?

Which term refers to hypothetical shortcuts through spacetime?

The multiverse concept helps explain which unresolved problem?

Which fictional universe popularized multiverse travel extensively?

In theoretical physics, what might separate one universe from another?