There are many theories out there. This is one of those theories. Inspired by Flatlands.

4thdimensiondimensionsFlatlandsspacetimescienceEdwinAbbottmathmathematicsphysicsgeometrytheoryquantumEuclideanpancakesphilosophyfourthlighttravelmysterydynamicsxkcdhatguyxkcdwattssaganFour-dimensional Space