2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/87464We review the available evidence according to which physical media alter the Minkowskian spacetime with consequential alteration of the speed of light; we point out the apparent emergence of superluminal speeds within the hyperdense hadrons; and we point out the lack of conclusive character of the available related measure, those on the behaviour of the meanlives of unstable kaons with energy.5 pages, 1 figureGeneral Physicstext