Parallel Universe and Multiverse

Parallel Universe

Our universe was formed when a singularity exploded 13.7 billion years ago and formed all the galaxies and planets in it. This is how earth was formed and then life evolved in it, but what if we were not only one formed. Along with space time also moved this was discovered by Einstein, in physics space and time  fuse together to form space-time and if this space-time was flat and out of our imagination then it is possible that a mirror world exists, a parallel universe or more than one universe i.e, multiverse. This parallel universe can be next right to you, or somewhere else. This universe can be totally different, one where the laws of nature are different, one where you may be a different person or may not exist at all, one where already world war 3 is going on or this pandemic have wipe out half of the planet, one where technology is develop at its peak, so there are many possibilities.

Multiverse

Multiverse basically can be understood as if we take an object then all the possibilities that anything could occur with an object or it can be anything. It's like giving an object to a group of people and asking to describe it, so you see each person will describe it differently, that's multiverse but when they all notice the same thing (all the possibilities are played out) that makes our universe. There are many possibilities, many angles so it is multiverse but when things happen as they happen to be it makes our universe. 

Is it possible to enter a parallel universe?

According to fictional movies there are gates or wormholes to travel to parallel worlds but is it possible in real life? For wormholes it is possible that they open in other universes but they are small and short lived also they are unstable so if we manage to capture a wormhole and somehow with the help of technology make it possible to travel through them then, Yes it is possible. For a gate we can open one but it requires enormous energy, in quantity of which is produced by not one but many nuclear power plants and a machine which is able to fire a concentrated neutron beam at a particular point then it may be possible. 

What is the benefit of a parallel universe?

As for the benefits if the parallel world we discovered will have cooperative humans then we might be able to get benefits, but if it is habitat by our nightmares then that could be very unpleasant. It depends on the circumstances and what benefits we come out with.