  While most of the singularities of General Relativity are expected to be
safely hidden behind event horizons by the cosmic censorship conjecture, we
happen to live in the causal future of the classical big bang singularity,
whose resolution constitutes the active field of early universe cosmology.
Could the big bang be also hidden behind a causal horizon, making us immune to
the decadent impacts of a naked singularity? We describe a braneworld
description of cosmology with both 4d induced and 5d bulk gravity (otherwise
known as Dvali-Gabadadze-Porati, or DGP model), which exhibits this feature:
The universe emerges as a spherical 3-brane out of the formation of a 5d
Schwarzschild black hole. In particular, we show that a pressure singularity of
the holographic fluid, discovered earlier, happens inside the white hole
horizon, and thus need not be real or imply any pathology. Furthermore, we
outline a novel mechanism through which any thermal atmosphere for the brane,
with comoving temperature of 20% of the 5D Planck mass can induce
scale-invariant primordial curvature perturbations on the brane, circumventing
the need for a separate process (such as cosmic inflation) to explain current
cosmological observations. Finally, we note that 5D space-time is
asymptotically flat, and thus potentially allows an S-matrix or (after minor
modifications) AdS/CFT description of the cosmological big bang.
