Predictions of Ultra-High Energy neutrino fluxes

The recent discovery of the cutoff in the spectrum of Ultra-High Energy Cosmic Rays points to an extragalactic astrophysical origin of these cosmic rays. The neutrino flux at the highest energy is expected to come only from energy losses of protons and nuclei during propagation from their sources to the Earth. In this paper we discuss the uncertainties on this flux together with the possibilities of future experiments to discover it. We also briefly review possible Galactic and extragalactic point sources of neutrinos.