The art and science of this century reveal and exploit the resonating bond in all things. All boundaries are areas of maximal abrasion and change. The interval or gap constitutes the resonant or musical bond in the material universe. This is where the action is. To naïve classifiers a grap is merely empty. They will look for connections instead of bonds. They will seek the authors’ points of view instead of their probing for a process. Such readers will expect value judgments instead of understanding. With medieval dread they abhor vacuums. But by directing perception on the interfaces of the processes in ECO-land, all gaps become prime sources of discovery. Today’s ecological awareness is echo recognition in boundless acoustic space (Greek echo: returned sound, personified in mythology as a mountain nymph).