The Sagittarius A* supermassive black hole at the core of the Milky Galaxy may be "warping the spacetime surrounding it into a shape that can look like a football," according to the Chandra X-ray ...

Miguel Alcubierre was able to construct a valid solution to the equations of general relativity that enable a warp drive. But ...

By warping space-time, this drive could enable travel at ten times the speed of light without violating general relativity.

But simple it isn’t. General relativity’s equations fail catastrophically at a black hole’s centre, known as its singularity, where the warping of space-time simply goes off the scale.