The start of the Triassic period (and the Mesozoic era) was a desolate time in Earth's history. Something—a bout of violent volcanic eruptions, climate change, or perhaps a fatal run-in with a comet ...

The modern coelacanth is a famous "living fossil," long thought to have died out, but first fished out of deep waters in the ...

Learn why fossil specimens once branded as marine reptiles are now being recognized as coelacanths that lived in shallow seas ...

Earth's history is marked by violent mass extinctions that have shaped life on the planet. Here's how many of these events ...

When cynodonts, a diverse group of weasel-like synapsids gave rise to the earliest mammals during the Triassic, however, the scleral rings were lost.

The end-Cretaceous extinction created space in the ecosystem for birds, but also for mammals. Mammals first evolved from ancestors called therapsids during the late Triassic Period.

They were searching for fossils of prehistoric precursors to mammals and ended up discovering a bonebed containing an entire Triassic ecosystem.

While many dinosaurs and pterosaurs flaunted flamboyant feathers, early mammals were a dull lot. A study of the fossilised fur of six mammals that lived during the Jurassic and Cretaceous periods ...

The newly identified species — a flying reptile that soared over the dinosaurs during the late Triassic Period — was unearthed by a team led by Ben Kligman, a UC Berkeley graduate and ...