Physicists will literally model anything as a sphere to make the math easier. This cat has transcended reality by actually becoming the perfect spherical approximation! The Stefan-Boltzmann law calculates thermal radiation from objects, and yes, theoretically works on cats too. In physics problem sets, you'll find everything from "spherical cows" to "frictionless planes" because reality is messy and equations are clean. The cat's perfect loaf formation is basically proving that nature occasionally cooperates with our ridiculous simplifications. Fun fact: If you actually calculated the power radiated by this "spherical cat," it would be around 5.5 watts. That's enough energy to power a small LED light bulb. No wonder cats always feel warm!