Dinosaur Noses Are Cool

Nearly a century ago, while working in the 75 million year old rock of Alberta, Canada, the professional fossil-hunter George Sternberg found a stunning skeleton. The remains belonged to a six-foot-long "bonehead" dinosaur named Stegoceras, and, best of all, the dinosaur's frame included a complete skull - a rarity for these animals. More often than not, a rough geological afterlife has reduced these boneheads - technically known as pachycephalosaurs - to little more than their sturdy skull domes. Stegoceras is an exception.

The dense mounds of skull bones, bordered by spiky tonsures, are what have traditionally transfixed paleontologists. And given that Sternberg's Stegoceras has an exquisite skull, it has ...

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