  Cosmological implications of neutrinos are reviewed. The following subjects
are discussed at a different level of scrutiny: cosmological limits on neutrino
mass, neutrinos and primordial nucleosynthesis, cosmological constraints on
unstable neutrinos, lepton asymmetry of the universe, impact of neutrinos on
cosmic microwave radiation, neutrinos and the large scale structure of the
universe, neutrino oscillations in the early universe, baryo/lepto-genesis and
neutrinos, neutrinos and high energy cosmic rays, and briefly some more exotic
subjects: neutrino balls, mirror neutrinos, and neutrinos from large extra
dimensions.
