Questions answered in this episode:

"If the multiverse theory is true and other universes truly exist, and let's say we had the technology to escape our universe and go into interuniversal space...since time only exists because of the big bang and there are other "times" in different universes same as our own then what about the area in between the universes does time exist there?" - Barrows0re

"With the theory, or fact, that the universe is expanding how does science determine the edge of the universe? And once the energy/forces which drives the expansion is spent and the universe begins to shrink what is left in it's place? The same void/nothingness before expansion? Thank you." - patrick pegasus

Submit your questions for the next round of Ask the Experts by clicking here and posting in the YouTube comments (Google account required). And while you're there be sure to subscribe to the Spacelab channel for weekly videos on space and astronomy. 

The question with the most "likes" will be answered in the next video by a new guest expert. Previous episodes have featured astronomer Caleb Scharf, astrophysicist Neil deGrasse Tyson and Scientific American's own editor in chief, Mariette DiChristina.