  Several anomalies are discussed in neutrino physics, linked to the possible
existence of light sterile neutrinos. These sterile neutrinos would not
interact weakly, but they could leave an imprint in various measurements, such
as neutrino oscillation experiments or precise measurements of beta decay
spectra. Global analyses of neutrino oscillation data suggest sterile neutrinos
with a mass in the eV range, but reveal at the same time tensions with the
observed neutrino anomalies. In the next years several experiments will test
the sterile neutrino hypothesis with masses in the eV range with promising
sensitivities.
