[MHGinTN]

I wonder: if space and time are expanding, from what did they initially bubble? Could there be an event horizon (sort of like the bubble surface) that is the reflection of the materiality of spacetime as we experience it? Would this allow for a zero sum overall universe as Feynman was fond of speculating?

[AndrewC]

I wonder: if space and time are expanding, from what did they initially bubble?

I think most everyone agrees that space is expanding, and time seems to go only one way. The only term we have for something we cannot interact with that seems acceptable to all is "nothing". The upshot is there are two conclusions which result into a split of minds into two camps, those that believe the universe came into being from nothing for no reason, and those that believe the universe came into being from nothing for a reason, us. My opinion.