Neutrino Physics with Small Extra Dimensions

We study neutrino physics in the context of the localized gravity model with non-factorizable metric proposed by Randall and Sundrum. Identifying the right-handed neutrino with a bulk fermion zero mode, which can be localized on the ``hidden'' 3-brane in the Randall--Sundrum model, we obtain naturally small Dirac neutrino masses without invoking a see-saw mechanism. Our model predicts a strong hierarchy of neutrino masses and generically large mixing angles.