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The knee of the horse is made of several small bones. Although it is called the knee and bends forward like a human knee it is different in structure to a human knee. A human’s knee joint is a hinge joint. A horse’s knee is several bones held together by small muscles, tendons, ...
In reality of course all these factors likely played a role: structures do not always, or even often, evolve for a single reason. When people who know much more about ceratopsians tell me “The horns ofTriceratopswere for intraspecific display and combat”, I don’t doubt them. But I a...
It’s hard to say how important this factor is, but I note that almost all the anatomical variants I’ve helped students present at conferences or publish are things that they found in complicated areas – nerve plexuses, bundles of tendons crossing a joint, and so on – where they could...