15. The computer-implemented method of claim 7 , wherein a difference between versions of a network resource comprises a difference in at least a portion of visual content of at least two of the plurality of versions of the network resource.
7. A computer-implemented method for summarizing differences between network resources, the method comprising: under the control of one or more computing devices configured to execute specific instructions, obtaining data regarding a measurement of differences between a plurality of versions of a plurality of network resources, wherein the plurality of network resources are related, and wherein the differences are differences between versions of a single network resource; causing the display of a plurality of objects, each object corresponding to one of the plurality of network resources, wherein each object represents the measurement of differences between the plurality of versions of the corresponding network resource; and causing the display of a plurality of connections, each connection graphically associating two or more objects with each other, wherein each connection represents a shared property of the network resources represented by each of the associated objects.