If we set an absolutely fixed reference datum in space somewhere then (theoretically) every point in 3-dimensional space can be defined by a unique x,y,z coordinate. The conditions with respect to matter and energy at each point in space at any given time in history is unique and may be identified by an x,y,z,t coordinate.
As we experience our lives unfolding, we view the conditions in all of the spatial coordinates within the range of our perceptions and limitations of consciousness. It's like watching a movie. Assuming space is a continuum then the conditions at each point x,y,z,t have been determined and we are waiting for our perception to reach a given grouping of points in time.
If accurate this would mean that no events or experiences in history (past or future) are lost; simply not currently being perceived. With the appropriate technology it would be possible to re-acquire and re-visit an grouping of x,y,z,t coordinates.