Of course this is one of those debates that it would be hard to prove in any particular direction!

Commenter c g had this theory:

The big crunch seems easy enough to explain but again the analogies they are using are flawed. It should be better explained like this. A dense cluster of matter enough matter to account for a universe our size. Starts decaying to the point of which gravity can’t no longer contain it and become unstable enough to collapse in on it self and implode out wards setting free a imaginable amount of energy in many different forms. But the many difference is gravity, photonic, magnetic, electric, and a very basic form of atomic, and possibly even more. Like anti-atomic, and dark matter. These energies dance around the baby-verse and mix and mingle in relative and mysterious way and eventually begin to clump together in a familiar way. Which leads us to the more conventional universe we have today (Minus about 400 billion years of evolution). But if the universe is truly expanding in a exponential way then why do galaxies converge, as they say they do. That would be impossible in perpetually expanding universe. In fact is it not true that our own universe is combining with another? Explain to me this.

P.S. I’m sorry if I was very vague in my theory but I have current distractions that make it difficult for me to express myself accurately.

Commenter Ryan asks this interesting question:

What if the next universe happend. What if the universe that were in happened a day ago and we didn’t notice. What if our universe isn’t the first universe and it’s others that started. Our universe is coming and going constantly. Every deja vu moment is another memory from the different universe that happened and you remembered it. What if

Personally this one has me stumped. What are your thoughts? Feel free to comment.

https://www.youtube.com/watch?v=eYc8iRyL7YU