An extinct order of early hoofed mammals from the Paleocene and Eocene epochs with distinctive rounded joint surfaces.
From Greek kondylos (knuckle) + arthra (joints). Scientists named this ancient mammal group by their characteristic joint structures, which were unlike any living animals.
Condylarths were evolution's experimental phase—they were the ancestors of modern horses, whales, and cattle, but had a mix of features that look alien to us now.
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