Does “Spacetime” imply that all of time exists simultaneously in the same way that we perceive the dimensions of space to exist simultaneously?

Question

I’m trying to wrap my head around this. I perceive time as though the present moment is a wave I’m riding through space and experience. Does Spacetime, as presently understood, suggest that time is more likely an ocean that exists and is “real” stretching off towards the horizons? In other words, is the present the only thing that is real as we traverse the dimension of time? Or do the distant past and future also exist, despite my inability to experience them, just as distant points in space do?

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Answer 1

I don’t know enough to say how it’s different than the general theory of space time, but the specific idea you’re referring to is block universe. That more specific term might be helpful in finding more info.