Hints: oblivion space-time 1’37’左右处有一破折号( -- )

A supermassive black hole is quite simply gravity gone mad. An object of such concentrated matter its gravitational pull is insatiable. Nothing can escape it, not even light itself. Anything that gets close gas, stars and entire solar systems are sucked into oblivion. It even destroys the very fabric of the universe. If you think of the universe as a space-time web, the gravity of ordinary stars and planets creates a dent in this web. But the immense gravity of a supermassive black hole is so destructive that it distorts spacetime to breaking point.
At the heart of a supermassive black hole is one of the most mysterious things in physics -- the singularity, a point where space, time and all known laws of physics fall apart.

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