“…And if the theorists finally recognize that what is missing in the equations of the current theories of Physics is related to the missing of aether, then many theories will be proposed by several authors, in which the equations will receive the introduction of the aether contribution. In the field of the macroscopic world, a theory which is being successful for the obtainment of several results agree to experimental findings is the Symmetric Special Relativity-SSR (Cruz, 2016;Cláudio Nassif, 2008;Claudio Nassif, 2010;Cláudio Nassif, 2012, 2015, where, together with the Einstein's upper limit of speed for macroscopic bodies, is proposed a lower limit of speed for elementary particles, introducing by this way a symmetry for the Theory of Relativity. For the macroscopic world, the task of discovering new equations, where is introduced the participation of the aether, is relatively very easier than in the case of microscopic world, because for the macro world it is possible to start from the old well-known equations, in which the contribution of the aether is missing, and the task is summarized in the search of what is missing.…”