For 10 points, name these hypothetical regions of space whose gravitational pull prevents even light from escaping.
A 2014 paper attempted to solve the firewall paradox surrounding these objects. They undergo evaporation when particle-antiparticle pairs are generated; that radiation is named for the author of A Brief History of Time and the aforementioned paper, which argues that these objects have (*) apparent horizons, rather than event horizons. For 10 points, name these hypothetical regions of space whose gravitational pull prevents even light from escaping.
A 2014 paper attempted to solve the firewall paradox surrounding these objects.
black holes