To describe the essence of Tyrannosaurus rex, the most terrifying predator that ever lived, University of Chicago paleontologist Paul Sereno offers this: “Jaws on fast-running legs.” The monster had ...
It's known as the "Dueling Dinosaurs" fossil: A triceratops and a tyrannosaur, skeletons entangled, locked in apparent combat right up until the moment of their mutual demise. Even in the Hell Creek ...
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