Thunder beasts were among the first mammals to truly live large. The biggest of these rhino-like creatures, called brontotheres by experts, stood taller than eight feet at the shoulder and weighed ...

Very large things often have small beginnings. That certainly was true for brontotheres, the enormous, rhino-like herbivorous mammals that lumbered across North America and Asia during the Eocene ...

The United States was once home to some of the most incredible creatures ever to walk the Earth. From the bizarre beasts of ...

Aficionados of Isla Nublar, the verdant island that's at the center of the roar-markable action seen in the "Jurassic Park" and "Jurassic World" movies, know that dinosaurs really seem to love ...

When we think of dinosaurs, we tend to picture very large, terrestrial animals - perhaps something akin to Tyrannosaurus, or the mighty Diplodocus. These reptiles were, however, an extremely diverse ...

Prehistoric Planet combines award-winning wildlife filmmaking, the latest paleontology learnings, and state-of-the-art technology to unveil the spectacular habitats and inhabitants of ancient Earth ...

Editor’s Note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Very large things often have small ...