Save Big on Coursera Plus. 7,000+ courses at $160 off. Limited Time Only! Grab it Explore the fascinating world of extremal black holes in this 48-minute talk by Christoph Kehle at the Erwin Schrödinger International Institute for Mathematics and Physics. Delve into the concept of extremal black holes, which possess zero temperature, and discover a groundbreaking proof of their formation in finite time during gravitational collapse of charged matter. Learn how this construction definitively disproves the "third law" of black hole thermodynamics. Examine the central role of extremal black holes in gravitational collapse and gain insights into the new conjectural picture of "extremal critical collapse." This presentation, part of the Thematic Programme on "Nonlinear Waves and Relativity," showcases joint work with Ryan Unger from Princeton University.