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Pachycephalosaurus Wyomingensis
Image: Pachycephalosaurus wyomingensis dinosaur
WALLPAPER
The largest of the pachycephalosaurs ("domed dinosaurs"), Pachycephalosaurus wyomingensis had an extremely thick skullcap—up to 9 inches (23 centimeters) thick. Much of the skull, as well as the dinosaur's snout, was covered by small knobs.
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News: Fossil "Pompeii" of Prehistoric Animals Named U.S. Landmark

Nebraska's Ashfall Fossil Beds, home to hundreds of skeletons of extinct rhinos, camels, and other vertebrates, was recently named a national natural landmark.

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Article: Big Bad Bizarre Dinosaurs

Findings of bizarre Mesozoic fossils prompt John Updike to ask: What has evolution wrought?

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