  We show that the predicted primordial helium production is significantly
reduced when new measurements of the neutron lifetime and the implied
enhancement in the weak reaction rates are included in big-bang
nucleosynthesis. Therefore, even if a narrow uncertainty in the observed helium
abundance is adopted, this brings the constraint on the baryon-to-photon ratio
from BBN and the observed helium into better accord with the independent
determination of the baryon content deduced from the WMAP spectrum of power
fluctuations in the cosmic microwave background,and measurements of primordial
deuterium in narrow-line quasar absorption systems at high redshift.
