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Map of PNAS articles from eight biology subfields, color-coded according to subfield.

Map of PNAS articles from eight biology subfields


Map of PNAS articles from eight biology subfields, color-coded according to subfield. Two 2-D views (this image and the one below) on the 3-D space -- this one selected automatically by the computer.

Credit: Thomas Landauer, University of Colorado, Boulder; Darrell Laham, Marcia Derr, Knowledge Analysis Technologies

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