This discovery challenges the long-held belief that dinosaurs originated exclusively in the southern supercontinent, Gondwana.

The discovery of Ahvaytum bahndooiveche, a 230-million-year-old dinosaur in Wyoming, reveals dinosaurs existed in the ...

A newfound "chicken-size" dinosaur, recently unearthed in Wyoming, changes what paleontologists thought they knew about how ...

With a recent radioisotopic analysis of the fossil specimens dating the remains to around 230 million years old, this tiny ...

Dinosaurs inhabited the Northern Hemisphere millions of years earlier than scientists previously thought, according to the ...

A chicken-sized dino, the oldest known in North America, has thrown a wrench in the widely accepted timeline of early ...

Paleontologists discovered "North America's oldest dinosaur," challenging the origin story of the dinosaurs that once roamed ...

Learn more about this newly named dinosaur and how it's discovery sheds light on dinosaur evolution.

Paleontologists say the fossils could prove dinosaurs lived in the northern hemisphere millions of years earlier than ...

Study finds the oldest known North American dinosaur fossil in Wyoming, challenging previous beliefs about dinosaur evolution.