Spacetime

Is there any spacetime outside our universe

From special theory of relativity we come to know that matter and energy are equivalent. And from general theory of relativity we come to know that space, time and matter are interlinked and that there cannot be any space and time without matter. As matter and energy are equivalent, so we can also say here that there cannot be any space and time (or spacetime) without energy.

Dr. Sten Odenwald has provided the following information on behalf of NASA Astronomy Cafe, part of the NASA Education and Public Outreach program:

Implications of Emergent Spacetime

If an entity is emergent, then in general that will imply these three things:
1) The emergent entity cannot have any existence prior to its emergence;
2) The emergent entity (A) cannot emerge from just anything or everything or nothing; it can emerge from some particular entity or entities only (B); and
3) B must pre-exist before the emergence of A.

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