Scientists uncovered 280 million-year-old fossil remains of the oldest known animal with 'saber teeth.' This ancient animal ...
The first true mammals evolved roughly 200 million years ago, during the early days of the dinosaurs. But mammals are the last surviving members of an ...
Gorgonopsians are an extinct group of synapsids that lived during the Permian, between 270 and 250 million years ago. They belong to the evolutionary ...