Neutrino unknowns are clear gateways to new physics. Cosmology offers a
unique arena to unveil neutrino secrets in a way that is separate from,
but complementary to astrophysical and terrestrial searches. The next
generation of cosmological surveys will supersede the current, which is
already highly sensitive to neutrino fundamental properties. I will
present the state of the art, summarise future prospects and comment on
the main challenges in neutrino cosmology.