Explore the profound concept of entropy in this captivating 2-hour lecture by William Bialek from Princeton University. Delve into the 150-year history of entropy, from its origins in thermodynamics to its modern applications in information theory and beyond. Discover how this fundamental principle governs everything from the unraveling of clothes to the limits of technology and even the behavior of black holes. Learn about the Second Law of Thermodynamics, energy conservation, and the relationship between entropy and information. Gain insights into how entropy impacts our daily lives, from boiling water to streaming movies on our phones. Witness the power of mathematics in describing the natural world and unifying seemingly disparate phenomena through this single, elegant concept.