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 theoretical physics
Leonard Susskind
1940
Stanford theorist, one of the originators of string theory, and Hawking's chief antagonist in the black hole information debate — a dispute he narrated in "The Black Hole War" (2008). With Gerard 't Hooft he developed the holographic principle, and with Larus Thorlacius and John Uglum the principle of black hole complementarity.