Does the universe contain regions that cannot have any interaction with each other?
I'm not thinking about event horizons derived from a black hole but regions of space that are so far apart that they could never shared information from each other?
What I mean is is there a specific circumstance where something happening at point a can never (i.e. given as much time as you like) affect somthing a point b.
I was wondering about the expansion of the universe and how things seem to be getting father apart (on the very macro scale); would we ever get to a point where every partical in the universe was so far from every other partical that there would be zero interaction and it got me thinking if this could be happenig with regions of the universe.
I guess I'm thinking only spatially (as I think time is just another distance like point of reference) but I guess there could be time 'evet horizons', too.
BB and cosmology, please.
Edited by Larni, : routine editing
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