This "Map of Science" created by Los Alamos National Laboratory scientists illustrates the online behavior of scientists accessing different scientific journals, publications. It's a high resolution graphic depiction of the virtual trails scientists leave behind when retrieving information from online services.
Johan Bollen who led the research argues as follows:
"This research will be a crucial component of future efforts to study and predict scientific, as well novel methods to determine the true impact of articels and journals."
More information in PloS ONE