Judging by the comments I think there might be a good amount of interest in reading Gavin Bascom’s “On the Inside of a Marble” As for the actual question of sp

Judging by the comments I think there might be a good amount of interest in reading Gavin Bascom’s “On the Inside of a Marble” As for the actual question of spacetime, I like the author’s conclusion for the time being: “ But despite all the things that spacetime enables us to predict and know, it isn’t real in the same way that an atom is real. There’s nothing you can do to “detect” spacetime directly; you can only detect the individual quanta of matter and energy that exist within your spacetime.” For the future, I think ...“it’d be really cool if”.... holography stitched spacetime from entanglement/entropy such that we could measure directly... something quantum... and believe it to be a real measurement of spacetime itself, right here in good ol’ de Sitter (or wherever we are, should experiment find things afresh;). Is there any hope there I wonder.