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-In the 20 th century, physics has understood space and time as being coupled into a "spacetime" manifold, a fundamental arena in which everything takes place. Space-time was considered to have three spatial dimensions and one temporal dimension. Out of the mathematical formalism for the fourth space-time component X4 = ict one can conclude that time t is only a numerical order of material change, i.e., the motion that we obtain with clocks. Time is not a 4 th dimension of space. For the description of the Special Theory of Relativity it is here proposed an Minkowski 4D space whilst time t is merely a numerical order of a photon motion in a 4D space. This view opens new perspectives on the understanding of the quantum entanglement, where the 4D space becomes an immediate medium for quantum communication. X is a spatial distance. Considering time as being the fourth dimension of space does not seem appropriate from the physical point of view. It is more appropriate to see the Minkowskian arena as a 4D space rather than a 3D+T space-time. Some relevant theoretical results (regarding state space, for example) and experimental results (regarding the "immediate physical phenomena", namely phenomena that occur with an elapsed clock run equal to zero) suggest that the standard space-time cannot be considered as the fundamental arena of the universe and thus that the space-time manifold characteristic of the standard interpretation of special relativity must be replaced with a 4D space where time exists only as a measuring system of the numerical order of material change. a) sorli@spacelife.si b) dusan@bistra.si c) fiscalettidavide@libero.it