Trilobites are iconic marine arthropods from the Paleozoic era. Before the age of dinosaurs, trilobites were roaming the seas ...

3 min read The Cambrian period, part of the Paleozoic era, produced the most intense ... and a framework for supporting bigger body sizes. Trilobites, like this perfectly preserved specimen ...

A Pennsylvania lawmaker says she will soon propose a bill that would change Pennsylvania’s state fossil. The Pennsylvania ...

The oldest is the Paleozoic Era, which means ‘ancient life’ and ... Many groups of insects and mammal-like reptiles disappeared. The trilobites (a type of marine arthropod whose closest ...