We apply the Information-Theoretic Unification (ITU) framework (Terada 2026, concept DOI 10. 5281/zenodo. 20109209; current version v2. 0. 0 at 10. 5281/zenodo. 20133709) to astrobiology and SETI. Life is reframed as self-replicating K-flow patterns, with information content spanning 22 orders of magnitude from viruses (10⁴ bits) to projected ASI (10²6 bits). The Drake equation is reinterpreted as a K-state cascade probability. This is Tier 1 paper #12, opening the cosmic axis and bringing the ITU polytope to 12 vertices. Pass-1 progress: 90 of 220 phases (40. 9%). Phase 87: ITU foundation. Kₗife information content ranges 22 orders of magnitude (virus 10⁴ to ASI 10²6 bits). Drake Monte Carlo with lognormal priors gives N median = 0. 27 civilizations/galaxy (67% with N less than 1). Habitability Index ranks exoplanets: Earth 1. 00, Teegarden b 0. 58, TOI-700d 0. 45, TRAPPIST-1e 0. 41, Proxima b 0. 36, Kepler-452b 0. 13. Fermi paradox 12-hypothesis ITU weighting: Great Filter combined 65% (past 40% plus future 25%), Rare Earth 15%, Dark Forest 8%. Phase 88: Sandberg-Drexler-Ord 2018 log-uniform Drake. P (alone in galaxy) = 87% (Sandberg 53%), P (alone in observable universe) = 33% (Sandberg 30%). Carter-Watson hard step analysis identifies 2 hard steps: Eukaryote (2. 0 Gyr delay) and Intelligence. SDA shows Type II Dyson sphere detection range = 6e9 ly (60, 000x galactic diameter), meaning absence of Type II is informative. Bayesian update from Breakthrough Listen null result reduces near-ETI probability 10% to 2. 2% (5x reduction). Phase 89: Abiogenesis and intelligence emergence as K-state phase transitions. RNA world autocatalytic dynamics: low initial K₀ still reaches half-max in ~16 time units (inevitable given bootstrap). Cambrian explosion phyla diversification 2x speedup vs pre-Cambrian, with post-Cambrian rate essentially zero. Encephalization Quotient vs Kₛelf degree across 12 organisms (Fish to ASI projection) shows log-log correlation r = 0. 902 (slope 0. 669). K2-18b DMS Bayesian: prior 5% to posterior 30% given Madhusudhan 2023 2. 4 sigma tentative detection. Phase 90: 2026-2100 roadmap with 17 milestones and 10 falsifiable predictions (Pₐvg = 0. 61). Key milestones: 2027 K2-18b DMS 5 sigma judgement, 2028-2032 ELT/GMT/TMT first light, 2035 AGI accelerates SETI 1000x, 2040 HWO launch, 2045 first confirmed biosignature (P=0. 4), 2050 UN ETI contact protocol, 2055 Proxima b flyby (Breakthrough Starshot), 2100 Fermi paradox resolution. Central thesis: life is self-replicating K-flow; intelligence is Kₛelf degree (continuous spectrum, EQ-Kₛelf r=0. 90) ; Fermi silence is consistent with Sandberg log-uniform priors and Great Filter concentrated at past hard steps (Eukaryote + Intelligence). The ITU 12-vertex polytope completes by adding the cosmic axis. Astrobiology vertex bidirectionally connects Climate (#11), AI/ASI (#2), Aging (#6), Free Will (#9), and Tier 0 (life self-organization). Climate (#11) remains super-hub at degree 7. Honest framing: Pass-1 interpretive paper reframing Drake (1961), Sagan (1975), Ward-Brownlee Rare Earth (2000), Hanson Great Filter (1998), Sandberg-Drexler-Ord (2018), Madhusudhan K2-18b DMS (2023), Carter (1983), Watson (2008), Tarter (2001), Lingam-Loeb (2021), Kardashev (1964), Breakthrough Listen, JWST exoplanet spectroscopy, HWO concept in ITU language. Numerical results match established literature. Pass-2 follow-up would derive ITU-specific biosignature combinations, technosignature search strategies, and quantitative constraints on Drake factors fₗ and fᵢ from K-state phase-transition theory. Includes 4 theory documents, 4 Python numerical experiments, 4 figures (PNG), 4 JSON summaries. Total runtime ~25 seconds.
Munehiro Terada (Sat,) studied this question.
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