Bird beaks come in almost every shape and size—from the straw-like beak of a hummingbird to the slicing, knife-like beak of ...

No one had ever found a preserved keratin sheath from such a large theropod dinosaur before, Kobayashi says. The fact that the reptiles came in two- and three-clawed forms, similar to sloths ...

The oviraptorosaurs lived during the Cretaceous period (between 145 and 66 million years ago) and belonged to a group of dinosaurs called theropods. This is a group of mainly meat-eating dinosaurs ...

The discovery of Duonychus adds to the growing list of theropod dinosaurs that independently evolved two-fingered hands, a striking parallel to T. rex, whose undersized yet powerful arms remain on ...

Therizinosaurs were a group of either herbivorous or omnivorous theropod dinosaurs that lived in Asia and North America during the Cretaceous Period, which began 145 million years ago and ended 66 ...

Many major groups of dinosaurs emerged during this period, including massive sauropods like cetiosaurs and brachiosaurs, sharp-toothed theropods like megalosaurs, and some early ornithopods ...

Therizinosaurs represent an unusual offshoot of the theropod clade ... joins a growing list of recent finds that enhance the scientific community’s understanding of dinosaur evolution, behavior ...

Despite being part of the theropod group of dinosaurs — typically associated with carnivorous dinosaurs like Tyrannosaurus rex — therizinosaurs were herbivorous. These dinosaurs are known for ...

The set of tracks discovered on Skye show the movements of at least two dinosaur species — one a theropod, from the group that includes predators such as Tyrannosaurus rex, the other a sauropod ...