2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43251In this article, based on the talk given at the Cracow Epiphany Conference on Astroparticle Physics, I discuss some of the opportunities provided by high-energy and ultra-high energy neutrino astronomy in probing particle physics beyond the standard model. Following a short summary of current and next generation experiments, I review the prospects for observations of high-energy neutrino interactions, searches for particle dark matter, and measurements of absolute neutrino masses, lifetimes and pseudo-Dirac mass splittings.Based on review talk given at the 2004 Cracow Epiphany Conference on Astroparticle PhysicsHigh Energy Physics - PhenomenologyAstrophysicstext