The Most Beautiful Equation

Are equations beautiful? Does a mathematician see the machine code of the universe in the complex language they use? Does a Chemist see the flow of matter? Does a Biologist see the evolution of life? Does a physicist see the probabilistic nature of electrons? Many scientists would affirm their view that the equations that dictate their respective fields are artistic, in addition to logical.  So if equations can be beautiful, what is the most beautiful equation? Naturally, the most beautiful equation should be simple.  It should be somewhat intuitive, yet surprising in it’s result.  It should explain something fundamental about the universe,...