Dinosaurs ruled the Earth millions of years ago, and while many were peaceful herbivores, others were some of the most dangerous animals to ever walk the planet.

Scientists still debate the purpose of this dinosaur's iconic horns and spiky head plate. Find out what we’ve learned about how Triceratops lived and why it went extinct. Triceratops’ enormous ...

In the new study, researchers attempted to determine the dominant large herbivores that lived in the northern Yellowstone National Park area by analyzing steroids from animal dung in lake ...

Since little was known about where and how these animals lived before European colonization, the researchers decided to figure out which large herbivores dominated the Yellowstone region.