  Starting from concrete AdS/CFT dual pairs, one can introduce ingredients
which produce cosmological solutions, including metastable de Sitter and its
decay to non-accelerating FRW. We present simple FRW solutions sourced by
magnetic flavor branes and analyze correlation functions and particle and brane
dynamics. To obtain a holographic description, we exhibit a time-dependent
warped metric on the solution and interpret the resulting redshifted region as
a Lorentzian low energy effective field theory in one fewer dimension. At
finite times, this theory has a finite cutoff, a propagating lower dimensional
graviton and a finite covariant entropy bound, but at late times the lower
dimensional Planck mass and entropy go off to infinity in a way that is
dominated by contributions from the low energy effective theory. This opens up
the possibility of a precise dual at late times. We reproduce the
time-dependent growth of the number of degrees of freedom in the system via a
count of available microscopic states in the corresponding magnetic brane
construction.
