  We discuss early cosmology in theories where the fundamental Planck mass is
close to the TeV scale. In such theories the standard model fields are
localized to a (3+1)-dimensional wall with n new transverse sub-millimeter
sized spatial dimensions. The topic touched upon include: early inflation that
occurs while the size of the new dimensions are still small, the spectrum and
magnitude of density perturbations, the post-inflation era of contraction of
our world while the internal dimensions evolve to their final ``large'' radius,
and the production of gravitons in the bulk during these two eras. The radion
moduli problem is also discussed.
