The Second Law of Thermodynamics is one of the few scientific laws that has attained a status in wider culture, even featuring in rock tracks by Muse. Famously, C.P. Snow cited an understanding of the 2nd Law as something that every educated person should have.
The 2nd Law is often stated in technical language that makes its meaning hard to understand, but the basic principles are actually readily grasped. I was recently challenged to explain the 2nd Law at the level of a bright 13-year-old, and so here is my attempt. Continue reading