'The specific isotopic ratio of Xenon 129 in the Martian atmosphere matched, point for point, the kind of signature that one finds only at thermonuclear weapons test sites on Earth' (p. 203); 'the isotopic ratios of thorium and potassium were also skewed' (p. 204); '250 million years before the present' (p. 204); 'Cydonia and Utopia' (p. 205)

Mars air ¹²⁹Xe/¹³²Xe 2.522 ± 0.006 (Curiosity SAM, Conrad et al. 2016), Viking 1976 ≈ 2.5, EETA79001 glass 2.39; Earth air 0.983; solar wind 1.041; Mars interior (Chassigny) ≈ 1.03; ALH84001 carries today's ratio at 4.2 Ga (Cassata 2017)

Cumulative chain yields (ENDF/B-VIII): mass 129 0.7-1.7% per fission, masses 131-136 about 3-8% each, for every parent and spectrum (²³⁵U, ²³⁸U, ²³⁹Pu; thermal and 14 MeV); fission xenon has ¹²⁹Xe/¹³²Xe 0.16-0.36, and the mass-129 chain ends at ¹²⁹I

¹²⁹I half-life 15.7 Myr, initial ¹²⁹I/¹²⁷I ≈ 1×10⁻⁴ in the early solar system; ²⁴⁴Pu's natural fission xenon in meteorites carries ¹²⁹Xe at 4.8 ± 5.5 parts per 100 of ¹³⁶Xe, which is zero

Same air, same mission: ³⁶Ar/³⁸Ar 4.2 (Earth 5.3), ⁴⁰Ar/³⁶Ar ≈ 1,900 (Earth 299), ¹⁵N/¹⁴N +572‰, D/H 6× Earth's; the xenon's heavy isotopes enriched 3.7% per amu against the Sun; MAVEN: two thirds of the argon gone to space

The fractionation law (mass-dependent, one exponent), the Earth-air blast scaling (Y^⅓ and Y^0.4), the bulk-Mars iodine content

Whether a ratio that a half-life explains for free, that fission would push the wrong way, and that a 4.2 Ga rock already carries, amounts to a massacre or to a planet that lost its first air