What if our universe is not the only one? What if it is just a tiny bubble inside a much larger and more complex reality? This is the idea behind the bubble universe theory, which suggests that our universe is one of many possible universes that exist inside a black hole.
What is a bubble universe?
A bubble universe is a hypothetical region of space that has different physical laws and constants than the rest of the multiverse. The multiverse is the collection of all possible universes that exist or could exist. A bubble universe could form when a quantum fluctuation creates a tiny pocket of space with different properties than its surroundings. This pocket could then expand and inflate into a large and isolated universe, like a bubble in a glass of water.
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