The End-Ordovician Extinction was the first of the so-called ‘Big Five’ mass extinctions in the history of life on Earth - more than 80% of species in the oceans died out. But could you ...

The researchers' idea that Earth once had rings comes from reconstructions of Earth's plate tectonics from the Ordovician period —which ran between 485.4 million years and 443.8 million years ...

Two intense spells of volcanic activity 450 million years ago triggered a period of global cooling and falling oxygen levels in the oceans, leading to the extinction of 86 percent of all marine life.

This period, which occurred near the end of the Ordovician, is recognized as one of the coldest in the last 500 million years of Earth's history.

This new fossil site of worldwide importance has been analyzed by scientists from the University of Lausanne, in collaboration with the CNRS and international teams. This discovery provides ...

Paleontologists recognize five big mass extinctions in the fossil record. At the end of the Ordovician period, about 443 million years ago, an estimated 86 percent of all marine species ...

The Ordovician period offers a detailed window into early marine ecosystems and climatic transitions, with palynology and microfossil biostratigraphy serving as key tools in reconstructing these ...

The fossilized time capsule from Castle Bank is from the middle of the Ordovician Period, about 462 million years ago.

The Ordovician period’s impact spike coincides with the Hirnantian glaciation, a period of intense cold leading to glacier formation, sea level drops, and major marine extinctions.

An unusually well-preserved “Marine Dwarf World” from 462 million years ago was found at Castle Bank, Wales by a team led by the Nanjing Institute of Geology and Palaeontology of the Chinese ...

Home > Science Astronomers: Earth Had Saturn-Like Rings 466 Million Years Ago The temporary ring system may explain some strange geological happenings during the Ordovician Period.