Everyone knows that dinosaurs are extinct, and most people have some idea about how it might have occurred. But the exact periods in history when it happened are less well known. Was it a single ...

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 -- ...

A research team led by Academician Jin Zhijun from the Institute of Energy, Peking University, has revealed how interactions between Earth's tectonic activity and astronomical cycles jointly shaped ...

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 ...

A tiny piece of nearly 300 million year old preserved skin belonging to a reptile was found in an Oklahoma cave in January, scientists say Satellite View Image from ...