One of the biggest examples of the power of symmetry is the derivation of the quark model, by Murray Gell-Mann, which used two observed properties of seemingly unrelated composite particles to be brought into an organized relationship with each other. After probing the particles making up the Nucleus of particles, they stumbled upon Pions, Kaons, Sigma Particles, and more. Gell-Man brought order to this particle rumpus, and then pushed it one step further, as it began to dawn on scientists that these particles themselves were not the last level of structures to be observed, leading him to predict an entirely new class of particles, called quarks. He too, was swayed by beauty, saying that "...a beautiful or elegant theory is more likely to be right than a theory that is inelegant."