Upper limits on neutrino masses from cosmology
  Upper limits on neutrino masses from cosmology have been reported recently to reach the impressive sub-eV level, which is competitive with future terrestrial neutrino experiments. In this brief overview of the latest limits from cosmology I point out some of the caveats that should be borne in mind when interpreting the significance of these limits. 
Oystein Elgaroy (ITA, University of Oslo)