Where did you get this from? there is a theory called the Big Crunch which states that the universe will reach a point where it will begin to contract to the point of where it started again the big bang , scientists theorize that this might be the first of an infinite number of expanasions and contractions or it may be just another in the series of billions , but we don't have to worry about that seeing our Sun will run out of fuel long before this supposedly happens.
Our star, as we know it now will run out of fuel. The fuel is still there. It will re-form.
Human's can't understand things on that scale. Our minds are remarkable, but the human mind is very limited. We can't even truly fathom what a billion dollar is.
How are we expected to grasp molecules, atoms, their substructures, their substructures, and probably even THEIR substructures?
Or how are we expected to fathom the universe? Our galaxy is beyond our comprehension. There are billions of galaxies in the universe. We can't grasp the size of our galaxy, and we can't grasp the concept of a billion.
To us, the possibility of many universes exploding, imploding, and repeating many times is just out of the question.
Many religions use the phrase "how did humans get here without god?" "Do you think that we just sprang up from a few molecules?"
If you can understand that there are billions of galaxies in the universe, and that atoms make up the matter in that universe. You can't even begin to appreciate how many quarks there are to make up those atoms to make those galaxies in the universe.
The plausability that humans "sprang up" in our present form is an easily grasped possibility when you understand the insane number the above statment would be.
The chance that humans just came to be from some molecules is very possible when considering the size, and age of the universe.