Analyzing the EPR paradox, Schrödinger concluded that the problem lies in the way time is used in quantum mechanics. The Schrödinger wave equation, which was the focus of most of the discussion surrounding EPR, is not relativistically invariant and treats time in an essentially classical way. For example it assumes that there can be a well-defined "before" and "after" the collapse of the wave function. Once the wave function collapses into a particle, the event is irreversible. On the contrary, when the relativistically invariant wave equation (Klein-Gordon’s equation) is taken into account, there is no collapse of the wave function. In this paper a time symmetric interpretation, proposed by the mathematician Luigi Fantappiè in 1941, is presented and four experiments which support this interpretation and challenge the Copenhagen Interpretation are discussed. In Cramer’s Transactional Interpretation and in Costa de Beauregard’s Advanced-Action Interpretation the EPR paradox disappears when advanced waves are considered to be real physical entities.
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