and gave rise to new creatures, including rodent-size mammals and the first dinosaurs. By the start of the Triassic, all the Earth's landmasses had coalesced to form Pangaea, a supercontinent ...

The well-preserved findings could provide insight into how these Triassic amphibians lived and ... These alligator-size creatures belong to an ancient amphibian group known as metoposaurids ...

A skull of the Triassic amphibian Buettnererpeton bakeri ... For some mysterious reason, the creatures all died around the same time. Sediment slowly covered their bodies. For millennia, their ...

The discovery of nearly 20 alligator-size amphibians that died together during the Triassic in what is now Wyoming is providing scientists important clues about these creatures' lives.