The universe we live is not the only one. Parallel universes, or Multiverse, mean an unconfirmed theory in physics. According to the theory, beside our universe, there probably exists other universes, and these universes are the responses of possible states of universe. Maybe the fundamental physical constants of these universes are different with the one we cognitive, or just a tiny difference, or maybe the same. Vividly speaking, our universe just likes a bubble, suspended in the ocean consisted of multiple universe bubbles.

Is there another you reading an article which is exactly the same you are reading? But that guy isn’t you, who just live in a noisy city with misty mountain, endless grassland, a planet also called “Earth”, and rotating around a star with other seven planets. His or her experience of a lifetime is the same with your every second. However, this moment, maybe he is preparing to put down this article while you’re intending to read on. This thought of “Avatar” sounds strange and implausible.

For almost the hundred years, science has always been enveloped by a secret veil. There may be hidden other mysterious universe beyond human senses. Mistakes always claim that such place does not exist. The words they said, is full of ghosts and spirits. The last thing scientists wanted was to be associated with such superstition. But ever since 1920, physicists have been trying to make sense of an uncomfortable discover. When they tried to pinpoint the atomic particles, like electron, they found that it’s impossible. These particles have no fixed location. Particles could really, in some sense, be in one place in one time. The only explanation people could come up with is the particles don’t just exist in our universe. They are also in other universe with the rapid migration, and there are endless numbers of these parallel universes. All of them are existing tiny differences. In fact, there is a parallel universe, which one Napoleon won the Battle of Waterloo. In another, the British Empire has never colonized the Americas. In one, you’d never been born.

In essence, all that can happen to everything have occurred in one of the universes. That is to say, the universe we know this moment, is the parallel universe of the other.