Dr. Kristie Miller, co-director of the Centre for Time at the University of Sydney, explained that the block universe theory says that our universe could be seen as a big four-dimensional block of spacetime that holds everything that ever happens.
In the world of blocks, there is no “now” or “now.” Within the three directions of space and the one direction of time, all moments only exist in relation to each other. Your experience of the present is just a reflection of where you are in the block world at the time. The “past” is just a piece of the world at a different time. The “future,” on the other hand, is at a different time.
So, is time just a trick your mind plays on you? And, more importantly, is it possible to go back in time?
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