2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/11424This is a review of high energy neutrino astronomy that might be done with a kilometer-scale detector. The emphasis is on diffuse neutrinos of extragalactic origin and their relation to possible sources of the highest energy cosmic rays, such as active galaxies, cosmological gamma-ray burst sources and topological defects.10 pages, LaTeX plus 9 postscript figures. (Talk given at the OECD Megascience Forum Workshop, Taormina, Sicily, 22/23 May, 1997.)Astrophysicstext