Is our universe the only thing occupying the vastness of space? Perhaps there are more universes than just ours; maybe even an infinite amount that together make up a multiverse. The word multiverse refers to the general idea that the universe we live in might not be unique, and that there are many universes. Though it may seem like an impossible thought to even comprehend, there are separate theories in physics that independently point to the possibility of a multiverse. One idea of the multiverse is that it is just an extension of the universe we already know. Another idea holds that there are multiple worlds, but the laws of physics are consistent between them. Some experts believe the existence of a multiverse is more likely than not.