DEAGOSTINI / UIG / SCIENCE PHOTO LIBRARY DEAGOSTINI / UIG / SCIENCE PHOTO LIBRARY
Stygimoloch dinosaur. Computer illustration of the head of a Stygimoloch sp. dinosaur eating leaves. This herbivorous pachycephalosaurid lived around 66 million years ago, during the end of the Cretaceous Period (around 145 to 66 million years ago), in what is now the USA.
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