No, science has not found definitive evidence of another universe. While there are intriguing theories and observations that suggest the possibility of a multiverse, there is currently no concrete proof.

Here's why:

* Observational limitations: We can only observe our own universe, which is limited by the speed of light and the finite age of the universe.

* Theoretical possibilities: Some theories, like eternal inflation and string theory, suggest the existence of multiple universes, but these are theoretical frameworks and not directly observed.

* Lack of direct evidence: There's no direct evidence from telescopes, experiments, or other scientific observations that supports the existence of another universe.

What are the theories about other universes?

* Eternal inflation: This theory suggests that the Big Bang wasn't a single event but an ongoing process, creating new universes continuously.

* String theory: This theory suggests that our universe is just one of many "branes" existing in a higher-dimensional space.

* Many-worlds interpretation of quantum mechanics: This interpretation proposes that every quantum measurement creates a new universe with different outcomes.

The bottom line:

While the idea of a multiverse is fascinating, science has not yet found conclusive evidence to confirm its existence. It remains a topic of ongoing research and speculation.