This picture gives a close up view of a Pentaceratops skull on display at the Sam Noble Oklahoma Museum of Natural History. Pentacertaops was a horned dinosaur from the late Cretaceous Period (around 75 million years ago). Its name means...

This drawing shows the possible appearance of Abrosaurus, a dinosaur from the middle Jurassic Period (around 170 million years ago). Abrosaurus was a Sauropod but quite small relative to others, reaching about 9 metres (30 feet) in...

This drawing shows the possible appearance of Achelousaurus, a dinosaur from the late Cretaceous Period (around 80 million years ago) that lived in what is now North America. Achelousaurus was a herbivore that reached around 6 metres (20...

This drawing shows the possible appearance of Afrovenator, a dinosaur from the mid Jurassic Period (around 160 million years ago). The name Afroventor means 'African Hunter', referring to the area they lived and the fact that they were...

This drawing shows the possible appearance of Anchiceratops, a dinosaur from the late Cretaceous Period (around 70 million years ago). Anchiceratops was a herbivore (plant eater) that walked on four legs and featured three horns on its...

This drawing shows the possible appearance of Gastonia, a dinosaur from the early Cretaceous Period (around 125 million years ago). Gastonia featured a sacral shield and large spikes on its shoulders. It was named by James Kirkland in...

This CGI drawing shows the possible appearance of Giganotosaurus, a dinosaur from the late Cretaceous Period (around 100 million years ago). Giganotosaurus was a carnivore (meat eater) that was even bigger than the more well known...

This picture shows a scale size comparison between a human and a dinosaur called Sauroposeidon. Sauroposeidon was a huge Sauropod from the early Cretaceous Period (around 112 million years ago). Scientists estimate that it reached a...

What does a fossil named "Kelsey" tell us about the Triceratops horridus? Learn what the fossils say about this dinosaur's defense system, diet, and size. Be sure to click the "See the skeleton" link to interact with and learn about...