Explore the critical role of physics in thermobarometric research through this 24-minute talk by Ross Angel from the University of Pavia. Delve into topics such as mapping stress fields using Raman spectroscopy, the effects of confinement on stress gradients, and the challenges posed by isotropic and anisotropic inclusions. Learn how Raman spectroscopy can be used to measure strains in minerals like quartz in garnet. Discover the consequences of anisotropic thermal pressure and the opportunities it presents for advancing metamorphic petrology. Gain insights into the evolution of the field from its first age to what Angel calls "A Second Golden Age for Metamorphic Petrology."