But the Permian detectives are faced with a host ... Often called mammal-like reptiles—they looked like a cross between a dog and a lizard—the synapsids were Earth's first great dynasty ...

Did you know that before the rise of the mighty Tyrannosaurus Rex and the cunning Velociraptor, there were a species of prehistoric reptiles that ruled the earth between the Permian and Triassic ...

The end-Permian mass extinction event, 252 million years ago, was the largest ever, marked by the loss of as many as 90% of species. A key line of research has been to focus on the survivors and ...

The Permian period’s mass extinction had wiped out the mammals that could have been competitors for these reptiles on land and in water. One example of these mammals would be the Dimetrodon ...