horned dinosaur

A 125-million-year-old fossil from the early Cretaceous shows the skeletons of a smaller mammal biting a larger horned dinosaur, suggesting a much more complex ancient food web.

Scientists have identified an aggressive bone cancer — for the first time — in the fibula of a dinosaur that lived 76 to 77 million years ago. The diagnosis sheds new light on dinosaurs and disease.

The "new" dinosaur — named Wendiceratops pinhornensis — lived about 79 million years ago and helps scientists understand the early evolution of the family that includes Triceratops.