  We study neutrino physics in a model with one large extra dimension. We
assume the existence of two four-dimensional branes in the five-dimensional
space-time, one for the ordinary particles and the other one for mirror
particles, and we investigate neutrino masses and mixings in this scheme.
Comparison of experimental neutrino data with the predictions of the model
leads to various restrictions on the parameters of the model. For instance, the
size of the extra dimension, R, turns out to be bounded from below.
Cosmological considerations seem to favor a large R. The usual mixing schemes
proposed as solutions to the solar and atmospheric neutrino anomalies are
compatible with our model.
