Chaos Theory. "The qualitative study of unstable aperiodic behavior in deterministic nonlinear dynamical systems" (Kellert, 1993, p. 2). Aperiodic behavior is observed when there is no variable, describing the state of the system, that undergoes a regular repetition of values. Unstable aperiodic behavior is highly complex: it never repeats and it continues to manifest the effects of any small perturbation.

"Chaos lurks everywhere, as well as the popular saying that 'the beating of a butterfly's wing in Bombay can cause thunderstorm in Kentucky."

With Chaos theory we now have the explanations every child has wondered about; why no cloud ever looks like any other, why smoke never repeats its swirling patterns, and why eddies in the water never repeat the same pattern. What is currently not fully understood is that there is a profound order in Chaos, and that the individual uniqueness which Chaos bestows upon all things is the wellspring of all creation.

http://www.societyforchaostheory.org/