Learn more about the time period that took place 488 to 443 million years ago. 3 min read During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the vast ...

Impact craters found around the Earth that were made around the same time could be linked to debris falling from a ring, a new study suggests. By Becky Ferreira If you were to look up from Earth some ...

Subsurface Ordovician rocks in the Black Warrior Basin, Mississippi Embayment, and the eastern part of the Arkoma Basin reflect a different depositional history than coeval rocks exposed in the ...

Fossils from 465 million years ago recently discovered in Portugal have revealed the huge size reached by trilobites, the most diverse group of extinct marine arthropods. Geologists describe the ...

Journal of Paleontology, Vol. 81, No. 6 (Nov., 2007), pp. 1384-1395 (12 pages) New species of ostracods are described from the Tremadoc of the Cordillera Oriental (Argentina). These are among the ...

Gabe Allen is a Colorado-based freelance journalist focused on science and the environment. He is a 2023 reporting fellow with the Pulitzer Center and a current master's student at the University of ...

The first mass die-off on Earth was also one of the deadliest. Scientists continue to piece together the story of what happened. Cody Cottier is a freelance journalist for Discover Magazine, who ...

JUST over half a billion years ago, evolution hit a purple patch. In the space of a few million years, once-empty seas were suddenly overrun by all manner of newfangled life forms. Animals had arrived ...

Over half a billion years ago, during the Cambrian geological period, life on Earth started to get a lot more interesting. Thanks to the rise in free oxygen generated mostly by photosynthesizing algae ...

Toxic metals unleashed by depleted oxygen in the oceans may have helped trigger one of the largest extinctions of life in the planet’s history, new research suggests. High levels of lead, arsenic, and ...