During last years,
the `' model emerged as a minimal way to understand all cosmological observations,
such that it is often referred to as the "Standard Model of cosmology",
with most of the involved parameters measured within a
precision.
However,
against this robust experimental situation,
there is a clear clash with the Standard Model of particle physics,
that cannot explain many of the features of the
model.
Therefore,
we have today four challenging cosmological puzzles that seem to claim for new physics: (i) the matter-antimatter asymmetry of the Universe;
(ii) the nature of Dark Matter;
(iii) the acceleration of the Universe;
(iv) the nature of Inflation.
I will discuss how neutrino physics suggests interesting solutions to some of the cosmological puzzles.
A particulary attractive example is represented by leptogenesis for the explanation of the matter-anti matter asymmetry of the Universe.
The recent discovery of flavor effects opens new prospects for testing leptogenesis in neutrino mixing.
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