Computational anatomy

thumb|360px|right|Size of genera in the extinct bird family Confuciusornithidae, compared to a human (1.75 meter tall). A. [[Changchengornis. Based on the holotype. B. Confuciusornis. Based on several specimens of about the same size. C. Eoconfuciusornis. Based on the holotype IVPP V11977.]] thumb|Measuring shell length in bog turtles.