  Neutrinos at energies ranging from sub-TeV to EeV from astrophysical sources
can yield interesting physical information about fundamental interactions,
about cosmic rays and about the nature of the sources and their environment.
Gamma-ray bursts are a leading candidate source, and their expected neutrino
emission can address a number of current questions, which may be answered with
forthcoming experiments such as IceCube, Auger, ANITA and KM3NeT.
