Energy Basics: The Currency of Everything

What is energy, really? In this episode of Polymath, we build a true, intuitive understanding of the most important concept in all of science. Learn what energy actually is (not just "the ability to do work"), explore its many forms—kinetic, potential, thermal, chemical, electrical, radiant, and nuclear—and discover how energy transforms from one type to another in everything from eating breakfast to charging your phone to powering the Sun. We'll trace energy flows through everyday scenarios, explain why nothing is 100% efficient, reveal why energy always "degrades" into heat, and show you how understanding energy changes the way you see the world. Whether you're trying to understand why electric cars have limited range, why athletes eat so much, or why perpetual motion machines are impossible, energy is the answer. This isn't abstract physics—it's the currency that powers every transaction in the universe. And once you understand it, you'll never look at anything the same way.