The article mentions Einstein ten times, even tho he had almost nothing to do with the concept.
Black holes were first proposed in 1784. The relativistic equations for a black hole were found by Schwarzschild and a student of Lorentz's, but many mistakenly thought that there was a singularity on the event horizon. Some modern theoretical physicists still think that there is such a singularity, in order to preserve their intuition about information emerging from evaporating black holes.
Much as I like to see relativity research research, the astronomy work on black holes does not have much to do with relativity.
Black holes — objects so dense that not even light can escape them — are a surprise consequence of Einstein’s general theory of relativity, which ascribes the phenomenon we call gravity to a warping of the geometry of space and time.Not really. Since 1784 it has been understood that if gravitational force obeys an inverse square law, and the mass is sufficiently concentrated, then the escape velocity will exceed the speed of light and a black hole results.
Relativity does predict some strange things inside the event horizon of a black hole, but relativity also teaches that none of that is observable, so we will never know. There is no proof that there is any sort of singularity.
While general relativity is commonly described as explaining gravity as the warping of the geometry of space and time, that was not Einstein's view. He denounced this geometrical interpretation. And he did not believe in black holes.
“The road is wide open to black hole physics,” Dr. Eisenhauer proclaimed.It is true that we are getting a lot more info about black holes. A few decades ago we were not even sure that they exist, and now they are crucial for theories of galaxy formation, for explaining the brightest objects in the universe, and for studying gravity waves.
But all that stuff about singularities, entropy, evaporation, firewalls, information conservation, and quantum gravity are completely out of reach.