Feb. 25 (UPI) --By dominating ecological niches that might have otherwise hosted a diversity of smaller carnivores, so-called "megatheropods" dramatically altered the structure and diversity of ...

Schroeder et al.'s findings reveal the impact of megatheropods' "grow fast, die young" approach to life on dinosaur communities. The results show that communities with megatheropods worldwide were ...

A cameraman sets up a shot of a Tyrannosaurus rex "Growth Series" featuring a baby (C), juvenile (L) and young adult T. rex (R), in the Dinosaur Hall permanent exhibition at the Natural History Museum ...

Medium-size meat-eating dinosaurs are missing from the fossil record, and paleontologists think they've figured out why. Paleontologists have discovered gargantuan dinosaurs and wee dinosaurs, but a ...

Large meat-eating dinosaurs took on the role of multiple species while growing up, resulting in a shocking lack of ecological diversity during the Mesozoic, according to new research.

Paleo-ecologists from The University of New Mexico and at the University of Nebraska-Lincoln have demonstrated that the offspring of enormous carnivorous dinosaurs, such as Tyrannosaurus rex may have ...

As adults, huge meat-eating dinosaurs such as Tyrannosaurus rex - sometimes topping 9 tons in weight - ruled the Cretaceous Period landscape. But even as juveniles, scientists said on Thursday, these ...

Absence of smaller dinosaurs may be result of adolescent megatheropods crowding them out Teenage T rexes and other carnivorous dinosaurs the size of lions or bears may have crowded out smaller species ...