Researchers hope the "exquisitely preserved" fossil will cast new light on an enduring mystery in paleontology.

The fossil filled a 70-million-year gap in the understanding of how the brains of birds evolved: between the 150-million-year ...

Birds, the holdouts of the dinosaur age, diversified and flourished in the skies. But the rapidly evolving mammals stole the show. Starting from a fairly humble position 65 million years ago ...

Around 66 million years ago, the dinosaurs were killed by an enormous asteroid that hit what is today Chicxulub, Mexico. But a second asteroid struck during that same era at the Nadir crater off ...

Navaornis lived approximately 80 million years ago in what is now Brazil, before the mass extinction event that killed all ...

The fossil bird, which has been named Navaornis hestiae, lived approximately 80 million years ago in what is now Brazil, ...

The Psittacosaurus dinosaur fossils discovered in the Yixian Formation stood out for their remarkable state of preservation.