There are indications that the neutrino oscillation data from reactor
experiments and the LSND and MiniBooNE experiments show a preference for two
sterile neutrino species, both with masses in the eV region. We show that this
result has a significant impact on some important cosmological parameters.
Specifically, we use a combination of CMB, LSS and SN1A data and show that the
existence of two light, sterile neutrinos would rule out the cosmological
constant as dark energy at 95% confidence level, and lower the expansion age of
the universe to 12.58 \pm 0.26 Gyr.Comment: Accepted for publication in Astronomy & Astrophysics. References
added and typos corrected. Added numerical values for w ranges and Delta
chi^2. Minor extension of discussio
