There is the possibility that the anti-universe where time moves backward exists.

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Did an anti-universe where time runs backward exist before our universe? The fact is this. If that universe exists it advances in an opposite way to our universe. That anti-universe forms as cold. And then it will start to warm, and finally, it will turn too hot for the particle. 

So the intensive heat of that anti-universe will destroy particles and turn them into wave movement before it will fall into a giant black hole. Because that black hole will stay in absolute emptiness it starts to erupt. And that eruption forms the new Big Bang. 

If there was a universe before our universe. The ultimate fate of that universe must be the Big Crunch. 

That thing means that the universe and anti-universe could alternate. So if there was a universe before our universe, the ultimate fate of that universe would be the Big Crunch. That thing means that the anti-universe was before our universe. 

There is the possibility that when the universe will start to fall before the Big Crunch. The time would start to travel backward. The anti-universe will also face a Cig Crunch if that thing is exist. During the Big Crunch, the universe will turn to extremely high temperatures. 

The idea of the anti-universe where time runs backward is interesting. As I wrote before there is the possibility that the universe forms another universe or a giant quantum bubble. The energy would travel to the middle of the universe. 

And that means the time travels backward in that anti-universe. The anti-universe can explain dark matter. The antimatter universe is similar to our universe. But the material that forms the antimatter universe is mirror material. When antimatter impacts material. That causes annihilation. 

The entire material and antimatter both turn to energy. So if the antimatter universe impacts our universe that causes the ultimate end of both universes. In some very rare ideas, the Big Bang was the antimatter annihilation. If the antimatter galaxy hits the material galaxy that causes the ultimate destruction. One gram of antimatter would detonate the entire Earth. So what if the galaxy-size antimatter clouds will impact? 

Image 2: The Big Crunch. The vertical axis can be considered to be the expansion or the contraction with time. During expansion, time moves forward, and during the Big Crunch, time moves backward

But in the anti-universe energy flows to the center of that universe. And that thing causes the time travels backward if we think that time is energy. 

When the expansion of our universe causes, the energy level of the universe is decreasing. The energy flow in the anti-universe would make the energy level in that anti-universe rise. That means the ultimate fate of that hypothetical universe is the big crunch. Or actually, that hypothetical universe advances backward than our universe.

Because the electromagnetic wave movement hits the quantum bubble of the anti-universe that thing sends that wave movement to the middle of that anti-universe. And that thing will increase the mass of that universe. That thing causes a gravitational effect that pulls the mass and energy together. So in the distant future. That anti-universe would turn to extreme hot plasma. And then the plasma falls into the black hole. And when the black hole is in the middle of emptiness it explodes. 

This thing causes interesting vision. If there is a quantum bubble that sends wave movement to the middle of it and forms the black hole. The time is traveling backward in that bubble. And then, there is a possibility that there is a cut in energy flow. That causes the black hole in the middle of the quantum bubble explodes. 

Erupting a black hole would send the expanding material ball against that falling energy. So if the eruption of the black hole is strong enough that thing forms the new Big Bang. Because the gravitation of that new universe is dominating.

But the radiation pushes the original quantum field outside that can form two layer-universe. In the inner ball, time moves as it moves in our universe. But between the most out and inner quantum bubble time travels backward. 

The idea of the universe where time moves forward, but what is surrounding the area where time moves backward might seem very interesting or special. But as we know, time moves backward in the black holes. The reason for that is that the wave movement moves to the center of the black hole. 

In the cases like universe-size quantum fields, the electromagnetic wave movement acts like it acts when it hits to steel ball. The radiation starts to flow around the ball. And then the ball conducts part of that radiation in the middle of the ball. That thing requires that there is an electromagnetic vacuum in the quantum ball. 

There is the possibility that this kind of area is existing also in our universe. The requirement is that the radiation falls into that bubble. And the rising energy level will reload the energy that material loses when the universe expands. That kind of thing can make the material young again. 

https://www.popularmechanics.com/science/a39745160/anti-universe-running-backward-in-time/

https://www.rankred.com/anti-universe-exist-before-big-bang/

https://en.wikipedia.org/wiki/Ultimate_fate_of_the_universe

Image 1: https://www.rankred.com/anti-universe-exist-before-big-bang/

Image 2: https://en.wikipedia.org/wiki/Ultimate_fate_of_the_universe