Named Tawa hallae, it provides some crucial clues to how predatory dinosaurs evolved. Since the end of the 19th century it has been known that there are two major groups of dinosaurs.

The 6-to-12 foot-long, meat-eating creature, Tawa hallae, is described in Friday’s edition of the journal Science. The first dinosaurs developed about 230 million years ago, and T. hallae ...

Long, long ago, some of the first dinosaurs walked the Earth. But scientists have not known with any confidence where those initial dino prints were made. Much more recently, hikers stumbled ...

Dec. 11 -- THURSDAY, Dec. 10 (HealthDay News) -- Fossils found in New Mexico show that early meat-eating dinosaurs crossed continents, a new study reports. Researchers found 213-million-year-old ...

The 6-to-12 foot-long, meat-eating creature, Tawa hallae, is described in Friday’s edition of the journal Science. The first dinosaurs developed about 230 million years ago, and T. hallae ...

The 6- to 12-foot-long, meat-eating creature, Tawa hallae, is described in today’s edition of the journal Science.The first dinosaurs developed about 230 million years ago, and T. hallae ...

In the Dec. 11, 2009, issue of Science, a team of paleontologists presents the 213-million-year-old fossils of previously unknown carnivorous dinosaur Tawa hallae, including several of the best ...

The researcher team said it reached its conclusion from the discovery of 213-million-year-old fossils of the previously unknown carnivorous dinosaur Tawa hallae, recovered from a northern New ...

The dinosaur, now called Tawa hallae, had a body that was only the size of a medium to large dog, but its remains have helped scientists shore up where dinosaurs came from.

Newly described dinosaur fossils from New Mexico are helping scientists better understand the early development of these ancient creatures. The 6-to-12 foot-long, meat-eating creature, Tawa hallae ...