MICHAEL LONG / SCIENCE PHOTO LIBRARY MICHAEL LONG / SCIENCE PHOTO LIBRARY
Giraffokeryx, illustration. This extinct prehistoric mammal is an example of a giraffid, the living descendants of which are the giraffe and okapi. Giraffokeryx lived from 14 to 11 million years ago, during the Miocene. It has distinctive antler-like structures called ossicones on its head. Its fossils have been found in Europe and Asia.
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