Columbia University computer scientist W. Bradford Paley with Kevin Boyack and Dick Klavans sorted about 800,000 papers into 776 different scientific paradigms to make this graph showing the citations between papers of difference scientific fields. The graphic made the cover of Nature and also appeared in SEED and Discover magazines. The methodology of creating the graph is described on the author’s page about the map. Also check out Paley’s other work on charting and graphing including work on sparklines.