Break out your tin foil hats and just about all the weed you can find. We're going on a journey, folks.
A 30-page document was sent to the U.S. Army Operational Group on June 9, 1983 entitled 'Analysis and Assessment of Gateway Process.' It was released to the public in September of 2003, and included a drawn diagram suggesting that our universe is somehow existing inside of a black hole.
According to the CIA document, "It is possible to see how the implosion of energy patterns would cross and recross to create an incredibly complex four-dimensional hologram or Torus, in spiral shape in reflection of the multi-dimensional developing pattern of evolution." Good luck digesting that. The idea is that our universe was created by being sucked into a black hole and accruing mass over time.
As far-fetched as this idea may sound, there is some math that supports the theory. However no stone-cold evidence has been presented proving 100% that our universe ever originated from a black hole. It simply remains a theory.