The genus Tyrannosaurus most likely arose in North America, although its direct ancestors migrated over from Asia more than 70 million years ago, according...
Paleontologists have described a new genus and species of carcharodontosaurid theropod dinosaur based on depictions of the now-destroyed specimen from...
Meraxes gigas, a huge meat-eating dinosaur that lived in Argentina some 94 million years ago, had short arms like Tyrannosaurus rex.
Meraxes gigas. Image...
