in the ecosystems that now make up East Africa—especially in what is now Tanzania—complex ecological interactions developed between large herbivorous dinosaurs and their predators

This carnivorous dinosaur lived in what is now North America

Deinocheirus mirificus was a large dinosaur

Medusaceratops possessed a horny beak at the front of its skull and a prominent bony ruff at the rear

Chasmosaurus belli Scale:1:35 in the ecosystems that nowChasmosaurus belli is a species of ceratopsian dinosaur that lived during the Late Cretaceous period, around 76 to 74 million years ago, in what is now North America. This dinosaur belonged to the group of ceratopsids, known for their large crests and horns on their heads. Chasmosaurus belli was a quadrupedal herbivore with a distinctive skull. Its name, which means "large gape lizard," refers to the fenestrations or openings in its skull bone,