Researchers have identified various tracks made by tetrapods between 280 and 290 million years ago, which makes them the most ancient fossil footprints in Catalonia. They correspond to different ...

A newly discovered 300-million-year-old meat-eating mammal ancestor is the oldest known member of a line that gave rise to rhinoceros-size herbivores. The lizardlike animal, dubbed Eocasea martini, ...

Our world is the way it is because of the time when the synapsids struck back. Synapsids were the world’s first-ever terrestrial megafauna but the vast majority of these giants were doomed to ...