Although being everywhere in large amounts detection is difficult, but experimental data sets improved a lot over the last decade. Among the hottest questions discussed is whether neutrinos have a non-vanishing rest mass. The status of direct experimental searches like beta decay and double beta decay is discussed.
Evidences however stem from neutrino oscillations searches.
The current status is reviewed and future activities are outlined. Last not least, astrophysical and cosmological aspects of neutrinos are presented.