Not in the way I imagine you are using the term. But you can develop theories based on mathematical relationships that postulate that before the Big Bang that created this Universe, there was a Big Crunch where a previous universe expanded until it collapsed upon itself creating a singularity that then caused the Big Bang that created this universe. And thus this universe will expand before collapsing into its own singularity and then giving birth to a new universe.
The mathematics of a rapidly expanding universe is such that if run the mathematics in reverse, you reach a point in time billions of years ago where all the matter in the universe was encompassed within a singularity. Now of course, just because something is mathematically possible does not mean it physically exists in this universe but faith does not guide the scientist so much as mathematics and observations do.