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There is active research on a correspondence between spacetime and information, but it goes the other way round, with the idea that information may give rise to spacetime via entanglement. …

By definition of what a spacetime point (usually called an event) is, there can not be two distinct happenings there. … The Novikov principle relates to the causal structure of spacetime, that is to the ways spacetime events can be connected (or not) by world lines (timelike curves). …

And, there is no observer seeing spacetime from the outside, so no observer can say anything about the whole of spacetime. So the two statements you cite are false for any observer. … General Relativity describes spacetime from the inside; it does not provide a vantage point of view on spacetime as a whole. …

And of course, mass/energy distribution affects the curvature of spacetime (which is the phenomenon at the root of your question), which means the relationship extends to the nature of space, also. …

That frame is moving in spacetime with a four-velocity whose magnitude is $c$. … Inside my brain something asks: Would there be a way to interpret $E$ as some sort of kinetic energy the system is getting from the motion of its frame in spacetime? …

In GR a (non-extended) object not moving either in space nor time would just be a point in spacetime, what is called an event. That is not really an object, since it has no structure and no dynamics. …

What (special) relativity says is that space and time are not transformed independently when we change our point of view, and that the single invariant quantity that is the spacetime interval replaces …

This is called a foliation, and in general you cannot foliate the whole spacetime. Point three is that mass and spacetime are definitely not decouplable. … Spacetime is not a background. …

Spacetime is then the notion we use to still have a background after all. … In that view spacetime is far from static, it is more like a sort of fluid. …

An event is a point in the spacetime manifold, where the manifold itself is a mathematical structure allowing to retrieve the effect of gravity as seen by an arbitrary observer. … To say it otherwise: any observer will see spacetime as split between space and time, which means that no observer sees an event per se. …

a certain sense the contents of spacetime (in that case, particles) is spacetime. … So, maybe we are the fabric of spacetime. …

What I am coming to is that the stage/play duality must somehow imply an implicit third point of view, from which this duality is apparent, and which has a metaphysical standing as profound as both spacetime …

Perception happens here and now, so all perception at a given time for a given observer takes place within its own single event (the observer here-and-now as a point in spacetime). … In other words, one must not confuse the common notion of 'event' as 'something happening' with the relativistic notion of 'event' as simply 'a point in spacetime'. …

In multi-messenger astronomy it has experimentally be observed that gravitational waves and light originating from a far-away source (for example the 2017 neutron stars merger) are detected on Earth w …

Space time has existed from the beginning of the universe and until its end Spacetime does not live in a time dimension - instead, all time lines are included in spacetime. … tldr: spacetime has existed throughout the beginning and end of universe and are humans merely experiencing spacetime without free will? …