The universe will end its existence in the Big Crunch.

"A Cornell physicist proposes that the universe is only halfway through its 33-billion-year lifespan, and will one day reverse course. Based on new dark-energy data, Henry Tye’s model suggests the cosmos will stop expanding in about 11 billion years and ultimately collapse into a “big crunch,” ending in a single point. Credit: Shutterstock" (ScitechDaily, 

The new model suggests that the universe. Ends its existence. In the Big Crunch. The Big Crunch means that gravitation wins and all particles fall into the center of the universe. Then that ultimate black hole detonates and forms a new universe. The reason for that is. The distances between particles and other objects will increase. That makes gravitational interactions weaker. In the same way. The other three fundamental interactions turn weaker. 

And another thing is that. The universe leaks. The wave movement or energy travels faster than most particles. And that means wave movement travels before particles. That means the universe loses its energy all the time. Dark energy that rips the universe into pieces will turn weaker because the normal scattering effect doesn’t disturb that wave movement in the same way as other types of wave movement. 

“The local geometry of the universe is determined by whether the density parameter Ω is greater than, less than, or equal to 1. From top to bottom: a spherical universe with Ω > 1, a hyperbolic universe with Ω < 1, and a flat universe with Ω = 1. These depictions of two-dimensional surfaces are merely easily visualizable analogs to the 3-dimensional structure of (local) space.” 

If Ω = 1, the universe is flat.

If Ω > 1, there is positive curvature.

If Ω < 1, there is negative curvature.

If the density parameter is higher than one, Ω > 1, the universe will collapse. The problem is that the universe should be round anyway. Without depending on the main  shape. So the universe is not square. It's like some CD or round disk.

This means dark energy travels out from the universe. The third interesting thing is that the geometrical shape of the universe could be anything, but its farthest edge is a round or parabolic shape. The geometrical shape of the universe can be any one of those three possible forms, but those forms should be made of a round shape. So if the universe is flat, the shape of the universe is like a CD rather than a square. 

This means gravitation should win, and the universe will fall. Into one point. This means that things like a phoenix-universe could be possible. There is evidence in the Black Hole radiation. could involve information about the past universes that existed before our universe. So if the model. The spherical universe forms and falls again. And again turns real. The universe before the last is larger than the next universe. The reason for that is that not all energy will return to the point where the universe formed. This is one version of the cosmological mystery. And the thing that we should know is this. 

The universe has a beginning and an end. The end is the mystery. But if the end of the universe is the Big Crunch, that means matter forms a giant black hole, which will vaporize or detonate. Because matter cannot just vanish, that means the phoenix universe model is possible. 

https://news.cornell.edu/stories/2025/10/physicist-after-33-billon-years-universe-will-end-big-crunch

https://scitechdaily.com/the-universe-will-end-in-a-big-crunch-physicists-warns/

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

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