2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/132627We offer a detailed review of the physics behind the PVLAS experiment. We also address some laboratory and astrophysical cross-checks for the recent claim concerning a signal consistent with an Axion-Like Particle. Our aim is that the leading role played by Emilio (Mimmo) Zavattini in this field of research will become apparent.Talk given at the ``XII International Workshop on Neutrino Telescopes'' (to appear in the Proceedings)High Energy Physics - Phenomenologytext