  This is a brief review for particle physicists on cosmological impact of
neutrinos and on restrictions on neutrino properties from cosmology. The paper
includes discussion of upper bounds on neutrino mass and possible ways to relax
them, methods to observe the cosmic neutrino background, bounds on the
cosmological lepton asymmetry which are strongly improved by neutrino
oscillations, cosmological effects of breaking of spin-statistics theorem for
neutrinos, bounds on mixing parameters of active and possible sterile neutrinos
with the account of active neutrino oscillations, bounds on right-handed
currents and neutrino magnetic moments, and some more.
