Learn more about a time period marked by an intense burst of evolution. 3 min read The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known. The Cambrian ...

PASADENA, Calif.–Geologists have uncovered evidence in the oil fields of Oman that explains how Earth could suddenly have changed 540 million years ago to favor the evolution of the single-celled life ...

A three-eyed animal with wing-like fins once swam through shallow seas, using heightened visual perception to hunt smaller sea animals. S. hirpex was roughly the size of a human hand and had two ...