This is a theory of mine. It proposes that there is no space-time in which masses and particles move at some speed; rather, what we have is a series of pulsating contractions which move at the speed of light and generate the illusion of space-time because of their spherical symmetry. This Universal Contraction Theory (UCT) could be a candidate to TOE. It originated from a simple consideration: as light is the only thing which appears to expand everywhere, is it possible that everything is contracting and that a point of light is the only thing that is not contracting? Naturally if the contraction occurs in a three dimensional manner, we would see everything become smaller and move farther away… so the contraction must occur in an orthogonal direction that cannot be perceived as “space” but as a particular sensation: time flowing. Specifically, light-related phenomena could be due to the non-contraction of some points of space-time that cause the non-contraction of all the points related to them. The formulation of this thesis could lead to a simple explanation of the nature of light and its behaviour (particle/wave) as a cutter of inertial forces, and therefore of space-time itself. This theory also could lead to many interesting explanations and predictions. For example, matter would be nothing but the limit of implosion of empty space in the fourth dimension into a sphere having a “critical radius” CR, while energy would be a variation of the space-time curve (due to the presence of mass). This leads us to a simple explanation of Einstein’s formula. In fact if a mass m (whose points are contracting at c speed) is annihilated, the energy E measurable in any other point of Universe (that is also contracting at c speed) would be influenced by both the contraction speed of the observing point and of each vanishing mass point (i.e. c times c times mass).