Extremely energetic cosmic neutrinos: Opportunities for astrophysics,   particle physics, and cosmology
  Existing and planned observatories for cosmic neutrinos open up a huge window in energy from 10^7 to 10^17 GeV. Here, we discuss in particular the possibilities to use extremely energetic cosmic neutrinos as a diagnostic of astrophysical processes, as a tool for particle physics beyond the Standard Model, and as a probe of cosmology. 
Andreas Ringwald (DESY)