In this talk, we review an approach to describing cosmological

physics using ordinary AdS/CFT, where the cosmological physics is the

effective description of an end-of-the-world brane which cuts off the

second asymptotic region of a two-sided black hole. The worldvolume

geometry of the brane is an FRW big-bang/big-crunch spacetime. In

favorable circumstances, the brane acts as a Randall-Sundrum Planck

brane so that gravity localizes. We describe a microscopic construction

for such an end-of-the-world brane with localized gravity in AdS/CFT,

starting from N=4 SYM theory. We suggest specific microscopic states of

N=4 SYM theory that may encode the physics in a four-dimensional

cosmological spacetime.