Visual Timeline
Cosmic Timeline
From the parent universe through the bounce to SPHEREx 2028 and beyond.
The Story of the Universe
A previous universe contracts under gravity. Density increases toward Planck scale (~10⁹³ g/cm³).
Matter-dominated contraction. Perturbations grow, imprinting f_NL = -35/8 on the bispectrum. PBH seeds form.
Torsion (or quantum gravity) prevents singularity. Density reaches maximum but stays finite. Expansion begins.
Universe expands rapidly. No inflation needed — the contraction phase already solved the horizon and flatness problems.
Light elements form (H, He, Li). Identical to standard cosmology. ΔNeff ≈ 0 confirmed by our MCMC.
Universe becomes transparent. CMB carries bounce imprint: f_NL, birefringence β = 0.27°, spectral index.
Galaxies form from bounce-era perturbations. Our 195K DESI anomalies trace structure at z > 2.
Dark energy begins dominating expansion. Whether w(z) crosses -1 (quintom-B behavior) is treated theoretically in our program; external DESI DR2 (Adame et al.) reports 2.8–4.2σ for w-crossing depending on dataset combination. Our own DESI DR2 w0wa chain (Paper 1B) gives w_pivot = −0.952 ± 0.019, +2.5σ from −1.
BigBounce research program: 6 papers, 8 surveys, 37.3M sources, 378,280 anomalies, 309,189 frozen MCMC samples, 8.47M-galaxy chirality catalog. 20+ review rounds complete (latest INT-M2, 2026-06-30) — MINOR-dominant with occasional ACCEPTs, 0 unaddressed genuine findings; readiness 96; awaiting author sign-off → coordinated arXiv drop.
NASA's SPHEREx will measure f_NL to σ ≈ 0.7–1.0. If f_NL ≈ -4.375: bounce confirmed at >4σ.
JAXA's LiteBIRD will measure birefringence to ~0.03°. Tests β = 0.27° prediction at ~9σ.
ESA's LISA will detect induced gravitational waves from PBH formation. Tests bounce GW spectrum directly.