**Astrophysicists have suggested that our universe could exist inside a four-dimensional black hole.**

Our cosmos began as a singularity, a point in space that was infinitely hot and dense. According to CERN researchers, the black holes in our universe could have the same characteristics as those described by the scientific community.

Black holes form when huge stars die and collapse into an incredibly dense mass from which not even light can escape. Scientists call the event horizon the boundary of space where light cannot escape and no object can return.

In the first trillionth of a second after the Big Bang, the universe began to expand at a speed greater than the speed of light. Until then, space did not exist, so there was also no universal speed limit. That is, the expansion of space slows down over time.

Einstein’s theory of relativity states that huge objects “bend” spacetime, hence the curvature of spacetime around a black hole. It would be virtually impossible to see black holes without the light and heat they absorb.

The more matter a black hole absorbs, the larger it grows, along with its event horizon. As the black hole expands, the rate at which matter falls decreases. To an outside observer, due to the strong gravity, nothing seems to move. According to the theory of relativity, from the perspective of a person sucked into a black hole, time seems normal.

**Are we inside a black hole?**

Space contains three-dimensional black holes with two-dimensional event horizons. According to this reasoning, if the universe is an event horizon, it must originate from a four-dimensional black hole.

It is impossible to determine what happens at the singularity of a black hole, so we get infinities, while the event horizon can be calculated with modern knowledge and equations.

Matter falls into the black hole and the event horizon encodes it. As the black hole grows, so does the event horizon, so the surface is precisely the size needed to hold all the information of all the matter that has fallen since the big bang.

This information constitutes the information of our universe. Surprisingly, the math adds up to answer key questions about our universe and black holes.

“The big bang hypothesis holds that our relatively comprehensible, uniform, and predictable universe stems from the physics-destroying madness that is a singularity. That seems unlikely,” say researchers from the Perimeter Institute and the University of Waterloo.

It’s hard to imagine that our universe could exist inside another universal black hole. The black hole hypothesis seems to fill in the missing pieces that scientists and experts have been searching for ages, leading us to believe that our universe is bigger and much stranger than we ever imagined.