Here is a pretty interesting theory by an Indiana University professor, Nikodem Poplawski, stating that we are living inside a black hole all along...
In a study published earlier this year, Poplawski said when the density of matter reaches epic proportions, torsion counters gravity. This prevents matter from compressing indefinitely to a singularity of infinite density. Instead, matter rebounds like a spring, and starts expanding again. In Poplawski's latest study, his calculations show that space-time inside the black hole expands to about 1.4 times its smallest size in as little as 10-46 seconds -- two orders of magnitude faster, for lack of a better word, than the Planck time. This brisk bounce-back could have been what led to the expanding universe that we see today.
But here's the real kicker: as Poplawski says, we may not be living in our universe at all; we might be living inside a rebounded black hole that exists in a different universe......Still not making sense? read on in the link below.