Zan Spacetime in my mind is a union of "space,and "time" that comes out
of SR Once read it was the"fabric that space is fashioned' It gives
more reality to where the events of the universe take place. Helps us
measure the distance the event(say explosion) was from us Spacetime
does not come out of GR it came out of SR and I think Zan that comes as
a little surprise to you (yes?) Bert