I take eternal and infinite to by synonyms to mean that something has always existed.
I was just curious if in cosmology the words are used slightly different. For example, some say our universe is bound/predicted to expand infinitely but then deny that our universe is eternal and that it definitely had a "beginning" at the BB.
In a documentary I saw on TV (I can't recall the exact title), the same physicist said in one part of the show that the universe indeed did have a beginning but then, at a later part, said that we may be one of the many BB that has happened and it could be the case that we've banged before. If so, if we've banged before, does this not count as eternal? Maybe I'm the one who is confused here.
How is it that some cosmologists/physicists say that our universe did indeed begin (not eternal) but yet in another sentence support the idea of multiple BB prior to the BB that resulted in us and support the idea of multiverse?
Help me out.