A black hole is a region of spacetime wherein gravity is so strong that no matter or electromagnetic energy (light) can escape it — Robert M. Wald, physicist, 1984. Black holes… severely warp the fabric of spacetime (the three spatial dimensions and time combined in a four-dimensional continuum) — Maria Temming, 2014. This is, of course, a purely physical phenomenon and both the quotes above are, respectively, from a physicist and a science writer. But