There is reliable evidence that teleportation is not a product of writers' imagination but a real fact. At different times it has been explained in different ways.
The first theory of teleportation was formulated in 1899 by the American scientist Ambrose Bierce. He supposed that there is something like a set of openings and voids in our world. Light does not pass through them, because there is nothing to carry it. As the scientist explained it figuratively, "our space is like a knitted jumper: you can put it on, although, if you look closely, the jumper consists... of holes. Suppose an ant lands on the sleeve. It may accidentally fall between the stitches and find itself in a world completely different for it, dark and stifling, where instead of the familiar spruce needles there is warm, soft skin..."
Bierce's theory echoes the second theory, about the existence of black holes, which, like polyps, suck in all the matter around them and swallow it with their gravitational "throat". If a spatial "hole" were created artificially, a kind of gateway in our space-time, then the distance from one point to another would be covered instantaneously - as if along some passage in which there is neither time nor space. Incidentally, the first to speak of the existence in the universe of "bridges" joining different points of the three-dimensional world by a shorter path through the fourth dimension was Albert Einstein. He maintained that the ordinary geometrical parameters - height, width and depth - are joined into a single whole precisely by time. Time is the fourth spatial dimension.
According to the third theory, proposed in 1938 by the physicist Ralph Harrison, one or several parallel worlds exist alongside our own earthly one. They pass through us and occupy the same space as our three-dimensional existence. There are points at which these worlds touch ours most closely. For the most part these are places where large flows of water or air form eddies. Sometimes the "abyss" opens - this depends on the meteorological conditions. Near Bermuda, for example, the site of the anomalous phenomena shifts with the Gulf Stream current. Similar phenomena can occur in the atmosphere as well. When the channels between the worlds open, living creatures and objects can move through them from our world into a parallel one and come back again into ours. Ralph Harrison explains it as follows: "Imagine yourself... a caterpillar that has landed on a person's shoe. Suppose you have to get across to the other shoe - the journey up one leg, across the hips and down the other will take at least a day, and it is dangerous (it is easy to fall off). But then the person happens to cross his legs in such a way that you... drop onto the other shoe, having made in an instant a journey a day long!"