A fossil tyrannosaur pulled from the badlands of southern New Mexico has forced paleontologists to rethink when giant predatory dinosaurs first reached extreme body sizes in North America. The ...
After T. rex was first described in 1905, the world’s most charismatic megafossil could have turned out to be a mere curiosity. Tyrannosaurus rex is still the biggest, baddest land predator of all ...
A giant tyrannosaur in the late Cretaceous, 74-75 million years ago. (Chase Stone) A new analysis of a shinbone from the oldest known giant tyrannosaur in North America suggests that the 'king of ...