By- Shivanshi Srivastava
There are now some scientific theories that support the idea of parallel universes beyond our own.
Science fiction loves the idea of a parallel universe, and the thought that we might be living just one of an infinite number of possible lives.
Multiverses and parallel worlds are often argued in the context of other major scientific concepts like the Big Bang, string theory and quantum mechanics.
Mysterious process of inflation and the Big Bang have convinced some researchers that multiple universes are possible, or even very likely.
And as inflation ends in a particular place, a new bubble universe forms, Vilenkin wrote for Scientific American in 2011.
Those bubble universes can't contact each other because they continue to expand indefinitely.
"This picture of the universe, or multiverse, as it is called, explains the long-standing mystery of why the constants of nature appear to be fine-tuned for the emergence of life," Vilenkin wrote.
Some researchers base their ideas of parallel universes on quantum mechanics, the mathematical description of subatomic particles.
In quantum mechanics, multiple states of existence for tiny particles are all possible at the same time — a "wave function" encapsulates all of those possibilities.
Some physicists believe in a flatter version of multiple universes.
But if the universe began at a finite point, as nearly every physicist agrees that it did, an alternate version of you likely doesn't exist, according to astrophysicist Ethan Siegel's 2015 Medium article.