Newly discovered Cretaceous sea monster named after world-ending Norse serpent

Paleontologists have described a new species of mosasaur with "angry eyebrows" that lived 80 million years ago.

Newly discovered Cretaceous sea monster named after world-ending Norse serpent
Paleontologists have described a new species of mosasaur with "angry eyebrows" that lived 80 million years ago.

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