There's a new T. rex in town. Paleontologists have discovered the heaviest Tyrannosaurus rex ever seen in the fossil record. This massive predator, nicknamed Scotty, weighed roughly 19,500 pounds ...

That would make T. rex the hardest-biting terrestrial animal ever known. (C. megalodon, an extinct giant shark, bit at an estimated 41,000 pounds; Deinosuchus, an ancient crocodilian, at about ...

Although T. rex is a household name, what we know about this tyrannosaur is constantly evolving. Improved technologies, such as biomechanical modeling and x-ray imaging, have allowed scientists to ...