To merely list the titles of all the journal articles and books dedicated to the study and exposition of the phenomenon over the last two decades would take enough paper for a thousand M.E. News letters. To begin with, chaos is pervasive. It is present in the weather patterns that the meteorologists have such difficulty predicting more than a week ahead. It has been demonstrated in even the simplest electronic circuits. It occurs in dynamical systems ranging from simple pendula to orbiting planets.
Lasers can exhibit chaotic fluctuations.
So also can chemical reactions. There is a growing consensus that fluid phenomena such as turbulence are really a manifestation of deterministic chaos rather than something stochastic. Just this decade, the medical field has been alerted to the fact that physiological systems such as the heart, brain, and immune system naturally exhibit chaotic rhythms. A re-evaluation of data concerning the propagation of epidemics reveals the presence of chaos. We now know that many dynamical systems are capable of exhibiting this sensitivity.