  The fundamental properties of neutrinos are reviewed in these lectures. The
first part is focused on the basic characteristics of neutrinos in the Standard
Model and how neutrinos are detected. Neutrino masses and oscillations are
introduced and a summary of the most important experimental results on neutrino
oscillations to date is provided. Then, present and future experimental
proposals are discussed, including new precision reactor and accelerator
experiments. Finally, different approaches for measuring the neutrino mass and
the nature (Majorana or Dirac) of neutrinos are reviewed. The detection of
neutrinos from supernovae explosions and the information that this measurement
can provide are also summarized at the end.
