And the first vertebrate animals colonized land. In the Paleozoic Era, life flourished ... the Carboniferous. The last period of the Paleozoic was the Permian Period, which began 298.9 million ...

The period, and the Paleozoic era, came to a calamitous close 251 million years ago, marking a biological dividing line that few animals crossed. The Permian extinction—the worst extinction ...

The Silurian Period occurred from 443.8 million to 419.2 million years ago. It was the third period in the Paleozoic Era. It followed ... and marine animals underwent rapid differentiation.

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 ... to which vertebrates (animals with backbones ...

The die-off occurred 248 million years ago at the end of the Paleozoic Era's Permian period, which lasted from ... killing most plants and animals. presents the evidence for this theory: a sudden ...

Echinoderms are among the marine invertebrates that suffered the most severe losses at the end-Permian extinction. Or were they? The end-Paleozoic witnessed the most devastating mass extinction in ...

The Permian period began 299 million years ago at the end of the Paleozoic Era. A collision of continents had created one single supercontinent, Pangea, that extended from pole to pole.

MIT geologists have now reconstructed a timeline of the Earth's temperature during the early Paleozoic era, between 510 and 440 million years ago -- a pivotal period when animals became abundant ...