A careful analysis focusing on the estimated mass-energy of the universe and the enigmatic expansion of space-time, coupled with its regression into the past reveal that the cosmos is confined inside its theoretical Black Hole and – during the expansion phase – was never under the gravitational control of its total mass-energy released at its birth. Thus, indicating that it was born – during the absence of gravity and the predominance of the vacuum Field – as EMR flying radially into the surrounding vacuum and ahead of the ensuing g-effects, enlarging the domain of space-time and the size of the cosmic globe, which qualifies it (the Primary EMR) as the Dark Energy of cosmos. But after the partial materialization of the primary EMR into the basic building blocks of our universe (n, p, e), the local g-forces caught up with Matter, agglomerating it into trillions of galaxies, followed by their ongoing development, differentiation, and evolution, carried out in a cascade of nuclear fusion reactions, which forge the Chemical Elements of the Periodic Table. However, it will not expand forever, because the total amount of EMR released during the cosmic birth, apart from being partially tied up as Matter, is also exhausting itself by expanding the cosmic globe against the g-field… , reverting the cycle on attaining the max for the g-potential = c2 = M G/Rc; Rc = M G/c2. On the other hand, during the contraction phase, the presently scattered trillions of galaxies are destined to coalesce to a single compact system (R ~1017 m), bringing the compressed globe under the g-control of its total mass-energy and enclosing it very much inside its theoretical Black Hole! Thenceforth, the ever increasing unprecedentedly high Potential Energy (P. E.), Binding Energy (B. E.), and the relentless crushing g-forces contract the globe to higher and higher densities, impeding the propagation of EMR and slowing the pace of space-time – finally bringing it to a stop, rendering the ‘cosmic nucleus’ inert, lacking any Kinetic Energy (K. E.), and precipitating a drastic phase change. But sharply contrasting with the ‘Primeval Atom’ or ‘Singularity’ of the Big Bang, the present proposal postulates a limit on the g-compression of mass-energy and space-time, bringing it to a halt, R ~1011 m. Finally, the inert cosmic globe laying at rest in the Vacuum Field has the maximum possible P. E. with respect to the surrounding vacuum – into which it will rise and expand, starting a new cycle, as argued and detailed, along with some inconclusive alternatives, in the pdf of the present investigation.