Why you can’t hide a nuclear centrifuge under a mountain. When Iran built its Fordow and Natanz nuclear facilities, it buried them over 100 meters deep inside solid granite. The goal was to make them invincible to weapons like the GBU-57 bunker buster. But while depth can stop a bomb, it cannot repeal the laws of thermodynamics. In this extended documentary episode of Grand Structures, we explore the genuine physics of uranium enrichment and remote satellite detection. Discover why the microscopic mass difference between U-235 and U-238 forces these facilities to become massive, continuously-running industrial cities. We break down the physics of thermal satellite detection, why seismic sensors actually struggle to hear centrifuges, how InSAR radar measures surface deformation down to the millimeter from orbit, and why a single IAEA cotton swipe is the most powerful forensic tool on Eart

Source: How Satellites See Inside Iran’s Deepest Nuclear Bunker | Grand Structures