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Stephen Jones |
We were standing on an outcrop of ancient seabed in the Pawnee National Grassland, admiring the fossilized clam and oyster shells, when a prehistoric creature clambered up onto the rock and posed in the sunlight. With its armored head and spiny gray body, it reminded us of a miniature triceratops -- one of several dinosaurs that might have roamed this shoreline 70 million years ago.
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