👉 Tyrannosaurs were a group of extinct theropod dinosaurs that lived during the Late Cretaceous period, approximately 68 to 70 million years ago. These dinosaurs were characterized by their large size and powerful jaws, which allowed them to quickly reach speeds of up to 125-145 miles per hour (209-265 km/h) and to leap over 30 feet in the air. Tyrannosaurs were primarily herbiv