In all of physics, there is perhaps no topic more underrated and misunderstood than entropy. The behavior of large collections of particles, such as the universe, a grain of sand, or a tuna salad sandwich, is dictated by two universal laws: one involving energy, the other involving entropy. And yet, while energy is described in great detail throughout any introductory physics textbook, entropy is relegated to about two or three pages, and is usually badly described. Well, no more! Here's the real story of physics. Here's what really drives the universe. Here's what your physics instructor won't tell you. Here's entropy !!! The answer is entropy. Entropy and poker. Entropy and a box of air. Entropy and energy. Here it is: The Second Law of Thermodynamics But wait! I've put water in my freezer, and it comes out ice! Entropy and disorder.

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