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
Joseph Polchinski
1954 – 2018
Santa Barbara string theorist who discovered D-branes (1995), a result that made the microscopic counting of black hole entropy possible. With Ahmed Almheiri, Donald Marolf and James Sully he formulated the 2012 firewall argument, showing that black hole complementarity, the equivalence principle and unitarity cannot all be true at once.