: Adults could reach lengths of 40–42 feet and weigh up to 8–9 tons.
T. rex was a massive theropod that lived during the Late Cretaceous period, approximately 68 to 66 million years ago. : Adults could reach lengths of 40–42 feet
: New research suggests T. rex walked on its tiptoes, a bird-like foot function that made it an efficient walker rather than a high-speed runner. : New research suggests T
Tyrannosaurus rex : The "Tyrant Lizard King" The Tyrannosaurus rex remains the most iconic predator in Earth's history. Recent paleontological discoveries have dramatically shifted our understanding of this apex predator, revealing a creature that was more complex—and perhaps more bird-like—than the "monsters" depicted in 20th-century cinema. Physical Characteristics & Recent Discoveries : Adults could reach lengths of 40–42 feet
: Scientists originally thought T. rex matured in 20 years, but new bone analysis indicates they were slow growers, not reaching full size until 35 to 40 years old.
The "king" was both an active hunter and an opportunistic scavenger. Tyrannosaurus rex, facts and photos
: While popularized with scaly skin, evidence of feathers on close relatives suggests they may have had patches of feathers , particularly as juveniles. Diet and Hunting Behavior