Quote of the day

An ant colony is a great example of a complex adaptive system. The worker ants live three or four days, and you can explain about 95% of their behavior with a dozen rules. But the colony probes its environment in sophisticated ways, survives for years, performs maintenance functions, repairs the nest.... Looking at the dozen rules, you would not infer that you could get all that sophisticated behavior from the colony. --JOHN HOLLAND (University of Michigan computer-science and psychology professor)