2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40683We briefly review models of neutrino masses and mixings. In view of the existing experimental ambiguities many possibilities are still open. After an overview of the main alternative options we focus on the most constrained class of models based on three widely split light neutrinos within SUSY Grand Unification.22 pages, talk given at the 9th Int. Workshop on Neutrino Telescopes, Venice, March 6-9, 2001High Energy Physics - Phenomenologytext