Computer modeling indicates that the most enormous T. rex that ever lived could have weighed up to 33,000 pounds, compared to the largest known specimen, which weighed 19,400 pounds. The largest T.

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 ...

The real T. rex would have found it impossible to keep up with a speeding car. But Tristan didn’t need to run any faster. At that speed, he could easily chase down the slow-moving herbivores ...