  We study the primordial nucleosynthesis and cosmic age in the presence of a
net lepton asymmetry as well as baryon asymmetry. We explore a previously
unnoted region of the parameter space in which very large baryon densities $0.1
\le \Omega_b \le 1$ can be accommodated within the light-element constraints
from primordial nucleosynthesis. This parameter space consists of $\nu_\mu$ and
$\nu_\tau$ degeneracies with a small $\nu_e$ degeneracy. Constraints from
cosmic microwave background fluctuations are also discussed (orito00).
