Explore scale and conformal invariance in sigma models through a comprehensive lecture delivered by renowned physicist Edward Witten from the Institute for Advanced Study. Delve into advanced concepts in condensed matter physics as part of the 2024 Princeton Summer School on Condensed Matter Physics (PSSCMP). Gain insights into the intricate relationships between scale invariance and conformal symmetry in the context of sigma models, a crucial topic in theoretical physics. Benefit from Witten's expertise as he elucidates complex ideas and their applications in modern physics over the course of 66 minutes. Enhance your understanding of fundamental principles that bridge quantum field theory and condensed matter physics in this intellectually stimulating presentation.