Search for the neutrino mass and for cold dark matter in the Universe are at
present two of the most exciting fields of particle physics and cosmology. This
lecture will restrict itself on the search for neutralinos as cold dark matter,
and for the absolute scale of the masses of neutrinos, which are the favoured
hot dark matter candidates.Comment: 20 pages, revtex, 19 figures, Talk was presented at International
Sixth School "Non-Accelerator Astroparticle Physics", ICTP, Trieste, Italy,
9-20 July 2001, eds. R.A. Carrigan et al., pp. 148-174, World Scientific,
2002, Home Page of Heidelberg Non-Accelerator Particle Physics Group:
http://www.mpi-hd.mpg.de/non_acc