Abstract Modern physics assumes both the Big Bang singularity and a "hot early universe" as foundational. Hyperbrane Relativity (HBR) proposes a radical alternative: neither concept is necessary. There was no Big Bang, and there was no early universe in the conventional sense. The foundational reality in HBR is a Primordial Bulk—a pure 4-dimensional static space at absolute zero, without intrinsic time. Our observable 3+1 dimensional universe emerges not from a hot dense state, but through Scale-Induced Genesis: the hyperbrane's scale variation within this static bulk. What we call "cosmic history" is the ongoing trace of this scale transformation. The universe undergoes Eternal Generation—continuous creation at every moment, with the past returning to higher dimensions rather than flowing linearly. The arrow of time, Variable Speed of Light effects, and even the apparent evidence for a "hot early universe" (CMB, BBN) emerge as scale integration effects, not as evidence of an actual thermal beginning. Asking "what happened before the Big Bang" or "what started the universe" is meaningless—analogous to asking "what is north of the North Pole." The universe simply is; it requires no origin. We derive testable predictions including scale-dependent effective light speed (explaining the Hubble tension), enhanced early galaxy formation (consistent with JWST), and reinterpretation of CMB/BBN as scale effects. Dark energy and dark matter arise as geometric consequences of W-axis structure.
Yuichi Yamamoto (2026) studied this question.