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The cast of a fossil piece, right, is part of the jawbone of the lizard and is only about a quarter of the entire jawbone. At left is the tip of the jawbone. The lizard was researched by a team including Jason Head, Earth & Atmospheric Sciences Assistant Professor at UNL. The lizard, which roamed the earth 40 million years ago, was the size of a German Shepherd. Photo by Craig Chandler / University Communications

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