Yesterday, I was talking to some of my students at the Coolest Projects seminar in Dublin, and we ended up discussing Nikodem Poplawski’s idea that all black holes contain universes, and how that leads to there being infinite universes, and therefore we are all immortal (due to quantum immortality).

In Newton’s classical mechanics, the more mass there is in a volume, the stronger the gravity is near that volume.

However, if each black hole contains a universe, and then recursively contains its own black holes and therefore further universes and black holes (turtles all the way down!), then that means that each black hole can potentially contain infinite mass, and so Newton’s math suggests that the gravity of black holes is infinite in strength.

But it’s not. We know this because if it was, there would be nothing outside black holes – it would all be sucked in.

So how can a black hole contain potentially infinite mass, and yet not exude infinite gravitational attraction?

The solution lies in the speed of gravity.

If the sun was to suddenly vanish from our solar system, then the Earth would continue to orbit the space where it was for 8 minutes, because gravity waves take time to propagate across space.

If a black hole creates its own space inside itself, due to the huge pressure and friction, then gravity from the absolute center (for example), takes longer to get to the outside because it has more space to traverse.

We know from our own observations that this universe is expanding. If all universes within black holes are created by the expansion of space, then it is possible that the space is created at such a speed that gravity cannot travel from one side of the hole through the center to the other side, because the space expands so fast that it simply never gets there.

We know as well that in our own universe, there is no such thing as empty space. Virtual particles appear and disappear all the time. It makes sense that sometimes these virtual particles will appear, separate, and sometimes not recombine and vanish. Sometimes, matter (and therefore mass) will appear out of nothing.

And so, the inside of a black hole will create its own space, alone with its own new matter, seeding a new universe.

So how does this all tie in with immortality?

The number of possible configurations of energy/mass in a universe depends on the size of that universe. Space is made of nodes and lines connecting the nodes. There is no “distance” between the nodes. “Distance” and “size” are measured by literally counting the nodes and lines.

Because space is quantised, anything that is *in* space must be located on a specific node. This means that if there are three nodes, for example, then a point particle can only exist in one of three places. This in turn means that if you have four universes, each composed of three nodes (in the same configuration for simplicity) and one point particle, then at least two of those universes must be exactly the same.

The same principle means that if you have larger universes and more particles, there is still a limit to how many universes you can have before two of them must be exactly the same.

For example, if there are 4 nodes (again, configured similarly for simplicity) and 2 point particles, there are only 16 unique configurations (4+4*3). If there are 3 point particles, there are 40 unique configurations (4+4*3+4*3*2).

In the first case, if there are 17 universes, at least two are exactly the same. In the second, if there are 41 universes, at least two are exactly the same.

No matter how large the universe gets, there is still a number that equates to how many possible configurations it can be in. If more than that number of universes exist, then there are duplicates.

If all black holes contain universes, and there are then recursive universes and black holes, then there are infinite universes, and therefore there are infinite duplicates of universes.

This means that there are infinite universes which are exact copies of this universe, including copies of you, which have your exact history, memories, and thoughts.

If there is a chance that you will die tonight, there are some universes where you will die, but you will only be aware of those in which you survive.

And therefore, black holes and baby universes, lead to a kind of multiverse immortality.