Lythronax Argestes

This artist’s rendering released by the Natural History Museum of Utah, shows a newly-discovered dinosaur, Lythronax argestes, whose fossils have been found in southern Utah. Paleontologists say this proves giant tyrant dinosaurs like the Tyrannosaurus rex were around 10 million years earlier than previously believed. (AP Photo/Natural History Museum of Utah, Audrey Atuchin)

November 7, 2013

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