The Sense of Order A Book by E. H. Gombrich The Tiling Patterns of Sebastien Truchet and the Topology of Structural Hierarchy perceptionartorder
An edge is an interface An edge is an interface between two mediums. Edges are places of varied ecology. There is hardly a sustainable traditional human settlement that is not sited on those critical junctions of two natural economies. Successful and permanent settlements have always been able to draw from the resources of at least two environments. Bill Mollison, Introduction to Permaculture As a kind of gateway edgesmedia