Long before dinosaurs appeared Earth was shaped by a vast and unfamiliar world known as the Paleozoic Era Fossils from this time reveal early experiments in life including strange marine creatures tow ...

A piece of skin that predates dinosaurs was discovered in an Oklahoma cave earlier this month, scientists say. Estimated to be about 300 million years old, the fossilized skin resembles that of a long ...

Until recently, Orthacanthus gracilis could have been considered the 'John Smith' of prehistoric shark names, given how common it was. Three different species of sharks from the late Paleozoic Era -- ...

The curious minds at What If let you live through the entire Paleozoic Era, exploring the dramatic shifts in life, climate, and geography over hundreds of millions of years.

Fig.1: Tempo and mode in the body size evolution of Cambrian-Ordovician trilobites. Changes in maximum size (red) and mean size (blue) for each time slice, with lines and shading representing the mean ...

International scientists have uncovered the oldest known phosphatic stromatoporoid sponge, dating back approximately 480 million years to the Early Ordovician, in South China. Stromatoporoid sponges ...