Our universe had to be formed from something, scientists say

 According to the Standard Model, the universe appears after the big bang. Technically, this means that we can trace cosmic history back to the big bang. But if effects have causes, what caused the big bang? What existed before the universe?

The question of what existed before the universe is, in some way, meaningless. While effects in the universe have causes, the universe as a whole may not have or need them. But it sounds kind of weird.

However, there is an alternative hypothesis called the “cyclic universe” model. It states that our universe is part of a series of universes. Our universe is currently expanding, and if it continues to do so, it will continue to expand forever.

But what if the universe starts to contract at some point. It will contract until it reaches a new hot dense state, after which a new big bang will occur.

A cyclical universe does not need a beginning. It always was, always is and always will be. But the model is not without its problems. One of the main ones is the problem of entropy....<<<Read More>>>...