Natural evolution acts so slowly it is difficult to study. Tierra provides a much faster artificial evolutionary environment. Different random seeds give different ecologies. Most of the space represents unviable organisms. As the points flow through the space, they may bifurcate or split into sub-clouds.
Some regions are viable only if other regions are also populated.
Examples of Complex Adaptive Systems Hans Frauenfelder. Alan S. Perelson. The Schema A history of schemata as a means of organising and storing perceptions, providing a structure for how the mind models and interprets the world, from Aristotle and Plato, through Hume and Kant, to Bartlett, Minsky and beyond. A Complex Systems approach to computational molecular biology John H. Holland . Prediction and adaptation in an evolving chaotic environment Peter Schuster.