Many people believe that parallel universes exists but do they actually exists. Does Science has any proofs ?
At present, there are no experimental proofs but there are some facts that indicates the existence of parallel universes.
We know that balance is important for this universe or multiverse to exist. There should be an equal amount of positive and negative energies. There should be an equal amount of Good and Evil. There can't be any partiality. Similarly, for any event to occur, the multiverse must cover all the possible outcomes.
For example - if we throw a dice in the universe in which we are living and we got six then same dice must be thrown in the parallel universes to cover all the possible outcomes. Hence, on throwing a dice, we will get one in 1 universe, two in other universe, three in another universe and so on. Hence, six parallel universe will cover the possible outcomes of throwing a dice.
This sounds interesting but it is true. Parallel universes covers all the possible outcome of an event.
Suppose, Hitler may have won the 2nd world war in other parallel universe or America and Russia may be very good friends in other parallel universe.
Concept of Deja Vu
Another fact is "Deja Vu". Sometimes, we get a sensation that event which is occurring has already happened before. This is because that same event may have occurred with us in other parallel universe. Our existence is not restricted to a single universe, we have multiple copies coexisting in several parallel universes.