As I was watching the Luc Besson film Lucy, something occurred to me that may change my view on what happens inside a black hole. Toward the end of the film, the singularities of two black holes are seen to converge inside a 4-D hyperspace. This happens just as Lucy obtains her "full capacity" of knowledge. For those who haven't seen the film, Lucy is taking a drug that allows her to use 100% of her brain (riding the myth that we humans only use 10% of our brain, which has been debunked). Through the film, she is continuously accessing hidden regions of her brain, transforming her into a cosmic genius with all kinds of extra-sensory perceptions, including telekenesis, telepathy, divination, etc.
Since we are unable to see things in four dimensions, the film had to show these singularities converging in 3-D space. On film it looked a lot like the bottoms of two whirlpools coming together underwater. However, this isn't how it really looks, because the gravity inside a black hole is so strong that it literally sends matter into hyperspace once it goes beyond the event horizon. Rather, what we see in Lucy is just a 3-D representation of what it might look like.
Reflecting on this visual, I reached an epiphany about the nature of singularities. What if all the black hole singularities in the universe converge at the same point- at the center of hyperspace? The idea would work much in the same way that gravity does; neighboring singularities would converge first, then as they gathered collectively, they'd have greater powers of attraction. The strongest of these attractors would settle into the center of hyperspace, and its gravity would constantly pull weaker ones into its asymptote. All matter would essentially be squished into a tiny space with an even greater infinite density than one singularity would.
Let's try to make sense of this visually, if we can. Much like the living geometrical figures in Edwin Abbot's Flatland, we can’t see any extra dimensions beyond us. However, there is evidence of a fourth dimension if we consider Einstein's general theory of relativity, which arises from the curvature of space-time caused by massive bodies. In this context, we will think of gravity as causing the fourth dimension of space.
Though we can detect gravity, we can't actually see it. It bends all of space in invisible waves that can probably be detected much more clearly in 4-D hyperspace. Adding this extra dimension likens our 3-D space to a 2-D figure. In a black hole, gravity gets distorted so strongly that it rips through space-time. Once an event horizon is created, everything in a black hole enters something beyond our universe. That something is called a 4-D hyperspace.
There are trillions of black holes in the universe. Each of them have whirlpools of matter that probably spin around in hyperspace, serving as a pathway to their singularities. Think of a water drain; even after the whirlpool loses form, the water still swirls about as it goes down the drain, due to its centripetal motion. Knowing the nature of gravity, why wouldn't singularities be able to attract to one another inside the 4-D frontier? They already converge in regular 3-D space: sometimes on spectacular levels, like when the Supermassive black holes of two galaxies collide.
In order for this theory to work, everything in the visible universe must be expanding on a sphere, like a balloon being blown up. Because we are on the surface, the interior dimension of hyperspace can't be seen. We can't see it for the same reason that the world appears flat to us. Inside this figurative balloon, hyperspace has a center, which is where the singularities would converge. Perhaps a great many convergences triggered a second Big Bang, which may explain why the universe's expansion started accelerating 5 billion years ago. A critical mass may have been reached during this time, like in a nuclear explosion. The sudden displacement- one we'd have no chance of ever detecting- would be like an explosion inside the balloon of our hyperspace. This could explain how dark energy came into the picture. Dark energy wouldn't be anti-gravity so much as a property of space; that as the second Big Bang exploded inside our hypersphere, it's only natural that its surface would rip apart.
Finally, there's the notion that perhaps the hyperspace inside our hyperspace may be causing that one to expand, and so on ad infinitum, in a lovely fractal that would look much like a domino effect. The only problem in such a scenario is that if matter is always recycling itself in universes that are born from Big Bangs in hyperspheres, it wouldn't conserve all the energy lost in between explosions. An accelerating universe would leave enormous amounts of energy outside the border of the new universe, like all the matter we see now. As per the balloon analogy, what would happen to all this excess matter? Would it become absorbed by each universe's boundary, or get ripped to shreds by dark energy outside them?
At this point, I will leave such wild speculations for others to rack their brains with. I'm not even totally sold on the idea. To me, the idea that white holes- a black hole's mirror image- are doorways to other universes still makes more sense from a conservation of energy standpoint. But the fractal hypersphere could very well be the truth; it is more symmetrical and elegant when seen from afar. Rather than the chaotic scatterings of Black Hole portals leading into an infinite number of universes, the simplicity of a fractal hypersphere is very attractive. The tragedy is that we may never know what really happens inside a black hole. All this conjecture would ultimately prove pointless as it pertains to science. We can't have the kind of insight Lucy did, but she may have been gracious enough to at least show us a fraction of the truth.
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