I have always wondered on the nature of time...I will put forward two ideas that occurred to me and see if anyone has heard anything like these things:
(1) For one, I had an idea that there is just space, and there is no space-time matrix. In a sense what I thought of was that a space excludes time...that is it is some type of asymtotic boundary where time does not exist. In what we would call our past in the Universe, there are only the element or elements of time. All that exist in the Universe's past is time. Time does not exist in the immediate now and the future. Once something has happened it is locked into the realm of time. Time excludes all that is in space. For the Universe, all that has happened in its past is all things that were possible. And when the immediate now is gone, what remains is time, and everything possible for the Universe occurred. And to boot, this time element or elements acts in analogy like a river eroding into something what I might call antiprobablity, and the way it is eroding into this conjecture of mine, some type of information is being cast...what information is not sure, and I am not sure that the information has anywhere to go except back to an origin(?). In other words, there will be no such thing as time travel to where you actually go back to something that you can exist in, unless you can exist in the element or elements of time. There is no future, because maybe something like the probabilities hasn't played out, or eroded out.
(2) My second conjecture is that if space-time does exist, can space-time be decoupled so that there is only space. One might not notice it because you are embedded in the process of it happening. And would this decoupling be a means or process by which the Universe prevents itself from fragmenting into separate domains as the entire Universe keeps expanding; and maybe this decoupling might explain the acceleration of expansion. What happens with this decoupled Time is unknown to me in this conjecture.