Makes me nostalgic when I discovered a trove of chaos/complexity books in the college library, apparently the most represented topic in the science shelves as of 2008. Knowledgeable idiot warning. I was impressed about human brains existing at the edge of chaos. It does not go over one edge, its a system that has the opposite property of the butterfly effect: its state is buffered against impressions and strong impressions may move it to another stable state. Over the other edge: a normal brain plots as chaotic brainwaves while an epileptic plots as regular phases.