2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49037I review explanations for the three neutrino anomalies (solar, atmospheric and LSND) which go beyond the ``conventional'' neutrino oscillations induced by mass-mixing. Several of these require non-zero neutrino masses as well.8pp, procsla style format; Invited talk given at the ``8th International Symposium on Neutrino Telescopes'', Venice, Feb. 23-26, 1999High Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext