Tysarua
Junior Member
What if our entire Universe is actually the interior of a black hole that formed within some external space — a realm we have no knowledge of whatsoever? Interestingly, this hypothesis is not only plausible, but it also has a certain scientific foundation. According to Einstein’s General Theory of Relativity, a black hole is a region of spacetime with such an intense gravitational field that nothing, not even light, can escape beyond its event horizon. But what's even more fascinating is that the internal structure of a black hole, particularly in extended solutions to Einstein's equations, may not terminate in a “singularity” as traditionally imagined, but instead continue as a separate, “bubble-like” region of spacetime. This region can, in fact, be mathematically interpreted as a closed universe — one that resembles our own.
Some physicists, such as Nikodem Popławski, have proposed the idea that black holes might function as cosmological “birth canals,” where each black hole in one universe gives rise to a new universe beyond its event horizon. If that's the case, then our own Big Bang may not have been an absolute beginning, but rather the “exit” from a black hole formed in another universe. This would also help explain the observed isotropy of the cosmic microwave background and the exponential expansion of the early universe — as the gravitational pressure during the collapse of matter into a black hole could induce an inflationary phase inside the "newborn" universe.
Moreover, if we consider the Universe as the interior of a black hole, it becomes easier to understand why it can be topologically closed but unbounded — just like the internal spacetime of a black hole. We don’t perceive any “walls” to our Universe not because they don’t exist, but because the event horizon prevents us from accessing any external framework beyond the embedded metric.
In other words, we might be living inside a spacetime bubble formed by gravitational collapse — and we are simply unable to comprehend it, as everything we observe exists on one side of the horizon.
Some physicists, such as Nikodem Popławski, have proposed the idea that black holes might function as cosmological “birth canals,” where each black hole in one universe gives rise to a new universe beyond its event horizon. If that's the case, then our own Big Bang may not have been an absolute beginning, but rather the “exit” from a black hole formed in another universe. This would also help explain the observed isotropy of the cosmic microwave background and the exponential expansion of the early universe — as the gravitational pressure during the collapse of matter into a black hole could induce an inflationary phase inside the "newborn" universe.
Moreover, if we consider the Universe as the interior of a black hole, it becomes easier to understand why it can be topologically closed but unbounded — just like the internal spacetime of a black hole. We don’t perceive any “walls” to our Universe not because they don’t exist, but because the event horizon prevents us from accessing any external framework beyond the embedded metric.
In other words, we might be living inside a spacetime bubble formed by gravitational collapse — and we are simply unable to comprehend it, as everything we observe exists on one side of the horizon.
