Figure 2. Results of control analysis, with midsagittal sections of Homalocephale and Pachycephalosaurus cranial dorsa scaled to the same length, and subjected to unit forces. In Homalocephale (1), high-stress propagates through the structure. In contrast, stress diminishes rapidly away from the point of contact in Pachycephalosaurus (2). The color scale (right) ranges from red for high stress to blue for low stress; absolute magnitudes are not given because stress patterns are the same regardless of the unit force applied. Differing results indicate that dome shape had a much greater influence on stress distribution than animal body size.