Behind the dinosaurs was a case with skulls of Permian synapsids. They don't get many visitors. Lystrosaurus, the synapsid that inherited the barren world of the Triassic, stared out empty-eyed.

Most people think a meteor killed the dinosaurs - but that wasn’t Earth’s biggest extinction. The Permian-Triassic extinction ...

Birds' tails got shorter, their flying skills got better and their brains got bigger than those of dinosaurs. And modern birds, unlike their Maniraptoran ancestors, have a big toe that juts away ...

The new generation of scientists wants to put constraints on all the hypotheses flying around, and they think that the truth about dinosaurs—and dinosaur behavior—won't be uncovered with bones ...

WASHINGTON (Reuters) --Low oxygen levels could have triggered two giant extinctions hundreds of millions of years ago, allowing the dinosaurs ... boundary between the Permian and Triassic periods ...

Researchers have now uncovered proof of an ancient giant amphibian that predates the time of the dinosaurs ... in the past — existed during the late Permian Period. These two-meter-long ancient ...

Dinosaurs from the Cretaceous. A biological rule that lasted millions of years ago (photo credit: SHUTTERSTOCK) A rare fossil unearthed in Mongolia's Gobi Desert has led to the identification of a ...

Dinosaurs are archosaurs, a larger group of reptiles that first appeared about 251 million years ago, near the start of the Triassic Period. Some other non-dinosaur reptiles are also archosaurs, ...

The Triassic period stands out in Earth’s history as the time when dinosaurs first evolved ... of time before the Triassic was called the Permian. This was a time when a wide variety of animals ...