  We apply the idea of landscape (motivated by string theory) to study the
statistical nature of parameters/couplings in the standard model of strong and
electroweak interactions. Following the success of this approach on the fermion
masses, we discuss the divergent behavior of the probability distributions of
other physical parameters/couplings to obtain some insights on the quantities
that cannot be measured by current experiments but can be relevant in
cosmology, in particular those in the neutrino sector. From a relatively
strongly mixed PMNS matrix, we argue that the probability distribution of heavy
neutrino mass $P(M)$ does not diverge at $M=0$. This analysis favors the
degenerate heavy neutrino scenarios.
