Dimetrodon's name actually means "two-measure tooth," because, before it and its kin came along, most animals had rows of teeth that were basically identical. Meat-eaters, ...

Dimetrodon was not some aberrant reptilian monster from a bygone age; it was one of our close evolutionary cousins from the time long before the first true mammals evolved.

Dimetrodon diehards, our sail-backed icon is finally in the Jurassic franchise, making a debut that more than made up for the decades of sitting on the bench. Just like Neill, ...

Dimetrodon might have walked a lot taller than this Dimetrodon , one of the most recognisable of the pre-dinosaur predators, is due a makeover. For more than a century, it has been depicted as a ...

Long before dinosaurs ever walked the Earth, a terrifying predator ruled the land – and it was unlike anything alive today. In this video, we journey back to the Permian period to meet Dimetrodon, a ...

Dimetrodon, one of the first big land predators on Earth, was roughly the size of a small crocodile, with a snub nose, sharp teeth and a towering fin on its back.The creature lived about 280 ...

Dimetrodon had a mouth full of novelty. Most conspicuous were several different tooth types in the sail-backed protomammal’s jaws – incisor-like teeth for gripping, stabbing canines, recurved ...

Dimetrodon was thought to be one of the oldest dinosaurs discovered in the world when a man found part of an upper jaw in Prince Edward Island in 1845. The holotype specimen was named Bathygnathus ...

Learn about Earth’s history with five fossils that have stories to tell Paul D. Taylor and Aaron O'Dea Though massive creatures may look like a dinosaur, the Dimetrodon lived 50 million years ...

The Dimetrodon in ARK Survival Ascended belongs to the mammalian synapsid family that existed during the Early Permian period. Although commonly mistaken for a dinosaur, ...