Is it possible that our expanding universe could collide or merge, with another expanding universe ?

Question

Is it possible that our expanding universe could collide or merge, with another expanding universe ?

Answer 1

There are 4 known dimensions: length, width, height and time.  As we are expanding in all 4 dimensions, so is another "theoretical" universe.  Let's look at what we know on the miniature scales:  molecules.  Some molecules are repulsed by one another, some are attracted by one another.  I think that the same thing sould be true with universes.  some universes would be attracted to one another, forming something totally different than the two parts, or becoming a combination of the two parts.  Since matter can neither be created nor destroyed, only reorganized then I think that our Universe would either repulse the other universe, or it would combine with it to form a new universe.