Dinosaurs are among the most iconic creatures to have roamed the Earth, and today they hold a special place in the popular imagination. But what were the earliest ones to appear on the planet?

In the early Triassic period, the Earth experienced extreme heat, turning large land areas uninhabitable. New research reveals that some ancient reptiles managed to survive and migrate through harsh ...

Long before dinosaurs became dominant, Earth was ruled by an unsettling cast of reptiles that reshaped life after the ...

Ancient animals were walking around on bird-like feet over 210 million years ago, according to a new study. Ancient animals were walking around on bird-like feet over 210 million years ago, according ...

The Triassic period represents a pivotal chapter in Earth’s history, marking not only the recovery from the Permo‐Triassic mass extinction but also a remarkable burst in marine reptile diversity.

A newly described species of ichthyosaur is likely the largest species of marine reptile ever to be formally described, according to a study published April 17 in the open-access journal PLOS ONE by ...

In a simple world, an easy classification rule is that birds have feathers, mammals have hair and reptiles have scales, as did dinosaurs. However, the world is not necessarily simple, and it has been ...

There is new evidence that ancient high latitudes, to which early dinosaurs were largely relegated, regularly froze over, and that the creatures adapted -- an apparent key to their later dominance.