Neutrinos have attracted much attention lately, with 2 Nobel Prizes in 2012, 2015, and the first detection of very high energy neutrinos with IceCube in 2013. Ultrahigh energy (UHE) neutrinos, with energies ~10^18 eV, remain unchartered territory: they have not been detected yet, and their sources remain a mystery. Their existence is guaranteed however, as they are bound to be produced by the...
