We have heard and seen many existence of other dimensions, in the science fictional stories and movies. But is it actually possible to have more dimensions apart from the already existing four dimensions? Many physicists believe this idea and call it “parallel universe”. Parallel universe is defined as hypothetical universes which exist just like the one in which we are currently living. It consists of everything- energy, time, space, matter- just like our present universe. Collection of multiple parallel universes is called as “multiple universes” or “multiverse”. Concepts of multiverse are also evident in ancient Hindu cosmology. According to Hindu mythology, every universe has its own set of rules and is governed by its own god. Scientifically, it’s true. Every universe has its own sets of fundamental rules and is governed by it. How did the idea of parallel universe came into existence? Mostly from science fiction but there is a scientific theory beh...