Photos: Dinosaurs and Their Ancestors

New research says dinosaurs shared Earth for millions of years with ancestors.

Dinosaurs, Ancestors Share the Land

Dinosaurs
Dinosaurs
Dinosaurs
Dinosaurs
Dinosaurs
Dinosaurs
Dinosaurs
Dinosaurs
Dinosaurs
Dinosaurs
Dinosaurs
Dinosaurs
Newly discovered fossils show that dinosaurs and their nondinosaur ancestors shared Earth for tens of millions of years. In the back is an unidentified coelophysoid dinosaur, and in front of that, the dinosaur Chindesaurus bryansmalli munching on an animal that is an ancestor of today's crocodiles. The two dinosaur precursors are in the foreground: a quadrupedal herbivore similar to Silesaurus and, in the very front, the newly described Dromomeron romeri. (UC Berkeley)
Slideshows
1 2 3 4 5
ABC News on Facebook