"Stigmergy is a method of communication in emergent systems in which the individual parts of the system communicate with one another by modifying their local environment. [...] 'Stimulation of workers by the performance they have achieved.'"I remember a ride at Six Flags when I was a kid that started with a boat going into a cave. Where the ceiling dropped into reach, there was a huge neon splotch where countless bits of chewing gum had been stuck together. One solid plate of gum, beginning with a single piece and accelerating outward.