Krasnikov tube

A Krasnikov Tube is a hypothetical kind of space travel. It is a tube-shaped space tunnel that could connect two different places, like two planets, in less time than it would take to travel to those places in a traditional rocket. The tunnel is like a shortcut through space, or a kind of space highway. The way it works is by bending the normal rules of space-time, so that the inside of the tunnel is shorter than the outside. This means that things like rockets, traveling in a Krasnikov Tube, can move through space faster.