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.

The Triassic Period was a time of great change. Bookended by extinctions, this era saw huge shifts in the diversity and dominance of life on Earth, ushering in the appearance of many well-known groups ...

The Triassic period, spanning 252 to 201 million years ago, was crucial for the evolution of terrestrial tetrapods, including early dinosaurs, mammalian ancestors, and crocodile relatives.