In January, British physics superstar Stephen Hawking published a short paper declaring "there are no black holes." Of course, Hawking wasn't saying that black holes didn't exist, but that the physics of the black hole's event horizon needs some tweaking.
The root of this issue can be found in a 2012 research publication by Joseph Polchinski and his team at the University of California in Santa Barbara. When tackling the thorny problem of whether or not black holes destroy information, they found that if black holes truly do not destroy information (a standpoint that Hawking himself reluctantly advocates) and that information can escape from the evaporating black hole via Hawking radiation, there must be a raging inferno just inside the event horizon called the "firewall."
And herein lies a paradox. If we view a black hole as an object governed by general relativity, should an unfortunate astronaut get dragged across the event horizon, they shouldn't experience anything out of the ordinary ("no drama"); he or she will just drift on through, into the black hole, where, eventually, intense tidal forces gruesomely "spaghettify" them. But if we view black holes as objects governed by quantum mechanics, and they conserve information, that astronaut will immediately get incinerated by Polchinski's firewall (the antithesis of "no drama"). The two theories are symptomatic of our growing unease with the compatibility of general relativity and quantum mechanics, and black holes have become the front line of this battle.