Science´s main advice is to keep asking questions, and to keep imagining answers.
I like to follow that advice. So, some weeks ago i was thinking about The Big Bang. Actually I was thinking about how things were "before" the Big Bang.
Some theories say that there is no "before" The Big Bang due to the fact that space-time was created during The Big Bang, thus it is impossible to talk about "before" time was even created.
In any event I decided to not accept that there is no before and started thinking about other scenarios and I came up with a hypothesis that is “The Big Bang – in our universe – was just the spill of a rupture on another universe’s space-time fabric, caused by a supermassive black hole.”
It is not too complicated to explain the thought process:
One of the ways to visually depict Gravity is by using gravity wells (mass bends space) and to use the analogy of space-time being like a plan made of a long sheet of rubber, with mass being analog to balls (bowling balls, billiard balls etc) - see an explanatory video here.
When you place those balls on the stretched rubber they cause the rubber to bend, creating the gravity wells. If you throw a small ball - like a marble - through the rubber it will eventually fall into the gravity well of the bigger (more massive) ball.
Imagine then that an object, say a star, with a small mass will bend space-time just a bit (see fig.1 below) and as you add more mass to the star space-time will bend further (see fig.2 and fig. 3 below).
Let’s then also assume that Universe A is on the top side of the space-time fabric, while Universe B is on the bottom side of it. Let’s also assume that Universe B is currently empty (see fig. 1).
If we assume there is a supermassive black hole on Universe A that is attracting every single piece of mass from its universe and is constantly (and in an accelerating form) increasing its mass we can also assume that its gravity well is getting deeper and deeper (see fig. 4).
Now we need to assume that the space-time fabric has a limited stretching capacity and it will eventually reach its rupturing point.
Fig. 5 depicts that moment just before space-time ruptures. In the very bottom of fig. 5’s gravity well we would have all the mass of Universe A (or the critical amount of mass from Universe A that would cause space-time to rupture) concentrated in a super-massive black hole. Let’s assume that due to the immense gravitational forces acting upon the black hole mass, it has all transformed into pure energy.
So, when the space-time fabric reaches its stretching limit and ruptures all the mass/ energy will “spill” down to universe B causing Universe’s Big Bang, and transferring enormous amounts of mass/ energy from Universe A to Universe B (see fig. 6).
Simple/ Possible/ Potentially incorrect explanation!? I don’t know. But I felt like sharing it. Maybe it is even an old theory that has been dismissed already (I didn’t feel like researching it).
Of course this is just a 2D representation of a 3D (or 4D) reality, but it serves the purpose of allowing us to “see” the events that will actually happen in higher dimensional spaces.