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Title: Pachycephalosaurus competition
Caption: Late Cretaceous dinosaur competitive head-butting contest shows pachycephalosaurs positioning their bodies with solid bony domed heads lowered at right angles, and necks, bodies, and tails held in stiff horizontal position, to absorb the impact as they crash head-on against their opponent.
Credit: Album / Science Source / LAURIE O'KEEFE
Image size: 3012 × 1816 px | 15.6 MB
Print size: 25.5 × 15.4 cm | 1185.8 × 715.0 in (300 dpi)