It's been a couple of years since I've posted here, and am trying to get back into learning SR. I wanted to start with a general question: You often hear the phrase "we are moving through time". I've also seen space-time described many times as like a block. Another way I've seen it described is like a group of photographs of each moment stacked on top of one another. A speaker on a NOVA program said "it's like seeing the whole movie at once. Firstly, is it true that space-time is a block where all moments exist at once? Also, based on what I remember, relativity of simultaneity determines which part of the block we are in and in what order the "photographs" are stacked up for us. Is this correct? Regarding the phrase we are moving through space-time, are we really moving through it? Or, is time moving? I think we all feel subjectively that it is time that is moving. For example, when we are sitting still, we don't feel like we are moving through anything. Rather we feel all the clocks around us moving.