Wormholes are passageways through space-time, that are essentially connecting points between two separate distances or locations in the universe. If visualized, a wormhole is a tunnel connecting the entry and exit points linking two different points in space time, or different galaxies. The best and simplest way to show this phenomenon is a paper example when two dots are drawn at the opposite end of the paper, the paper folded in half and a hole pierced through the dots connecting the two dots with a pencil.
Wormholes are based as a solution to Albert Einstein’s equation of general relativity – the equation for which accounts for the short child wormholes, or Einstein Rosen Bridges, which essentially acts as giant blackhole linking two areas of space time. The theory suggests that the matter and light that is absorbed from one end escapes out of the other at the point known as a whitehole. This whitehole will be located somewhere else in the galaxy or maybe even in some other dimension.
These theoretical wormholes could be utilized for a variety of different things. Some say that travelling through a wormhole would take less time than through actual space, creating an enormous shortcut between any two destinations. Traveling at light speed seems impossible but we can easily travel faster than light using a wormhole. If two massively separated points are connected in this way, it would be possible to travel conventionally between the two locations, therefore even though the object is travelling slow inside the wormhole itself, it would still reach its destination before a beam of light outside. There are also theories surrounding significant gravitational field. For example, if we can place one end of a wormhole close to a blackhole, which has an incredible amount of gravity and acts to slow down the apparent time, the link between that place and somewhere else could provide the means of time travel.
Next step into space travelling or travelling to other dimensions, this theory relies on the many-world’s hypothesis and interpretation of Quantum Mechanics that reveals infinite universes in timelines. According to this idea, every choice or branching path that we take, exits in the endless list of others. Experts like Stephen Hawking suggest that the wormholes could be all around us but they are microscopically small existing in very deceptive spacetime as nothing is completely flat or solid. According to this theory, there are incredibly small holes in every piece of matter including the time itself, even smaller than the atoms. However, being so tiny we can’t even begin to imagine traveling between them or manipulating them.
Of all the options, these are imaginably the least likely scenario, primarily because we are not even sure if the many wormholes interpretations have any basis in reality because scientists are not even sure if wormholes exists. They do exist in theory, but there is no empirical proof that they are there. The whole idea is still far far more science fiction than fact.