This may not be exactly relevant, but the diagram here reminds me of > the "map of science collaboration" > described here: > > http://wbpaley.com/brad/ > > There was another rather more attractive diagram of a similar nature, > but I seem to have lost the link. But a Google search turns up one!: > A map of science > > http://www.wired.com/wiredscience/2009/03/mapofscience/ > > The brain map also has resemblance to diagrams of > the tree of evolution of life: > > http://tolweb.org/tree/ > > http://en.wikipedia.org/wiki/File:TreeActinobacteria.svg > > Though of course the visual resemblance doesn't necessarily > imply anything more profound than a similar graphic method.-Human social interactions are typically modeled in such diagrams--these similarities don't strike me as odd at all. Thanks for those links , they were all smashing reads!