For more than a century, modern cosmology has been dominated by the image of an expanding universe. The Big Bang model — supported by Edwin Hubble’s observations and confirmed by the cosmic microwave background (CMB) — describes a universe that emerged from a singularity and has been expanding ever since. Yet, this paradigm assumes the existence of an external "void" into which the universe expands — an assumption that cannot be directly verified or logically explained. Several contemporary thinkers, including Johan Masreliez, Laurent Nottale, and Glenn Borchardt, have begun to challenge this idea. They propose instead a model based on the internal dynamics of scale — suggesting that the universe (or multiverse) does not expand but rather contracts continuously, and what we perceive as expansion is only a relative illusion produced by proportional scale reduction.This inverse theory — which I call The Contraction of the Multiverse at Speed C — offers a logically coherent and elegant interpretation of the balance between motion, time, and energy.