A 150-million-year-old bird fossil, Zhengheornis, reveals the first step in the evolution of the short tails seen in modern ...

The Tenontosaurus was a large ornithopod that walked on four legs and roamed during the Early Cretaceous period, around 110 to 120 million years ago. Believe it or not, the dinosaur wasn't officially ...

More than 200 million years ago, life on Earth was experimenting with new forms. The Triassic period gave rise to animals ...

These long-extinct, fearsome creatures are turning up in living rooms and corporate offices as wealthy collectors indulge a ...

Utah Army National Guard aviators helped recover rare dinosaur fossils from Grand Staircase-Escalante National Monument in ...

Two dinosaurs fossilized in combat, originally thought to involve a juvenile Tyrannosaurus rex testing its mettle against a Triceratops, actually feature a separate species frequently confused with ...

From fossil sites to museums, these Wyoming dinosaur stops are full of prehistoric wonders and family-friendly fun.