Run for it. (IMAGE) University of Tokyo Caption This Lythronax lived in North America in the late Cretaceous period. These tyrannosaurids are estimated to have weighed up to 2.5 tons. Credit 2022 D.E. Winkler Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.