The religious ones are often based on nothing more than the stories, which have been passed down through countless generations from either a holy book or passed through word-of-mouth from generation to generation. While these stories are from completely different religions, a lot of the points that they have are the same throughout all of them. But also, many of the points that are made are completely different. In some religions an all-powerful being just created the world as we know it now like the Christian religion, or another religion says that there is no way of knowing when the universe was created just that it could be millions of years old, or not. The Islam religion states that god was the one to make the Big Bang Theory happen, so this religion has aspects of both religion and scientific incorporated into their story. The scientific theories of the origin of the universe do sometimes have some scientific evidence but it can never be proven. Mainly because according to most scientists the universe was created millions of years ago. One of the most popular of the theories is the Big Bang Theory, but there are others like the Steady State Universe Theory, or the Oscillating Universe Theory. Whatever theory that they have they will almost never change their minds. They are going on absolute faith, and they just think that everyone else is wrong.
Some of the most popular