Really good question! There are some theories that show that we are only one of many universes and they exist like a string of universes that curves through the cosmos but at the moment we are only speaking in theory and we do no have the capability to decide if there really are multi-verses! All at the moment is all speculation and theory.
Some scientists say there are, and there are lots of theories as to how, why and where they could exist We can’t really find evidence to prove it yet though, maybe that is what you will do when you are older?!
It would be interesting if we discovered there were more than one universe. It certainly give humanity a new sense of perspective. Think of the size of our solar system, as part of the spiral arm of the Milky Way, which is made of billions of solar systems in a universe with billions of galaxies and then you discover there are multipe universes. -that would be amazing
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