The Firewall Paradox

The firewall paradox, proposed by Almheiri, Marolf, Polchinski, and Sully (AMPS), suggests that an observer falling into a black hole encounters a 'firewall' of high-energy particles at the event horizon.

This idea challenges traditional views of black hole physics and has sparked significant debate in the field.

Don Page's work on extreme cosmic censorship also relates to these discussions.