Wormholes have intrigued both science fiction writers and theoretical physicists for decades. However, wormholes imagined in science fiction are very different from those seriously contemplated in modern theoretical physics; mainly due to the former's "macroscale dispatchability". In recent years there has been renewed interest in wormhole geometries. Regarding quantum gravity, both non-traversable and traversable wormhole geometries have recently been considered. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay Wormholes were first considered mathematically in the realm of relativity as early as 1921 by mathematician Herman Weyl. However, it was not until 1957 that the American theoretical physicist John Archibald Wheeler first used the term “wormhole”. A wormhole is a hypothetical structure that connects two distinct points in spacetime, "just like real tunnels burrowed by worms in a (Newtonian) apple." There are 3 types of wormholes, the first type of wormhole is an Einstein Rosen bridge, the second type is string theory wormholes and finally man-made wormholes. All these wormholes are just math at the moment, but in the future scientists may find one somewhere in the universe. Einstein Rosen bridges are the first type of wormhole to be theorized. It is theorized that these wormholes are found in every black hole at the place where the singularity is located and lead to an infinite parallel universe where time is backwards, so in our universe things get sucked into the black hole but in the parallel universe things they are expelled. of it, this is a white hole. But Einstein Rosen bridges actually cannot be crossed since it takes an infinite amount of energy and infinite time to cross them and close halfway. So if you try to cross them, you will grow old and die, and your body will be stuck in the singularity forever. Also because no one went to the parrel and you might not be able to enter a white hole too. So if we want to be able to travel the universe in the blink of an eye, we will need a different kind of wormhole, a wormhole without singularities to be able to travel through it. Fortunately, there is a type of wormhole that meets these standards. If string theory or one of its variants is the correct description of the universe, then string theory wormholes could be an easy way to travel through the universe. String theory wormholes are wormholes without singularities and were created in the first milliseconds after the big bang. These wormholes were formed by quantum fluctuations that created rifts in spacetime with cosmic strings strung through them. As the universe rapidly expanded, these little rifts in spacetime spread throughout the universe, and with them the strings grew longer. These wormholes might be the closest thing to a wormhole we could get without making one ourselves. However there is a problem, the cosmic strings in these wormholes may break if you try too hard on them and if they break gravity will cause the wormhole to collapse into a black hole. Which makes them very dangerous and difficult to use since we will not be able to move it much because if we tried to move it too much the string holding the back the gravity of the wormhole would break and form a black hole.There is a type of wormhole which is much more useful than Einstein Rosen bridges and string theory wormholes since it can be moved and has no singularities. These are man-made wormholes. Artificial wormholes are.