After a short introduction on the evolution of cosmological perturbations in the Universe, I will review some of the cosmological bounds related to neutrinos. In particular I will show how the recent data on the anisotropies of the cosmic microwave background radiation, combined with other experimental results such as galaxy redshift surveys, can constrain the energy density of radiation in the Universe and the sum of neutrino masses. I will also describe how future cosmological observations can improve the bounds on neutrino masses, eventually testing the whole range of values required by present evidences for neutrino oscillations.

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