The Black Hole Information Paradox
Physics insists information can never be destroyed. Black holes appear to destroy it. Both of those cannot be true.
1974/75 (Hawking radiation), 1976 (the paradox stated)24 min read
American-Canadian theoretical physics
Don Page
1948
Hawking's former graduate student, later at the University of Alberta. His 1993 analysis of the entanglement entropy of radiation from an evaporating black hole produced the Page curve, the quantitative signature that unitary evaporation must show and semiclassical Hawking radiation does not. Reproducing that curve became the concrete target that the 2019 island results finally hit.