The Ordovician period, which lasted from about 485 to 444 million years ago, is a significant era in Earth's history, marked by a rich diversity of marine life and notable mass extinction events.

These first steps toward life on land were cut short by the freezing conditions that gripped the planet toward the end of the Ordovician. This resulted in the second largest mass extinction of all ...

Ordovician-Silurian Extinction (about 443 million years ago): Around 85% of species went extinct, likely due to a combination of a drop in sea levels and glaciation, followed by rising sea levels ...

Speciation and extinction are fundamental processes that ... Finally, a reevaluation of the Cambrian Explosion and the Great Ordovician Biodiversification Event has led to new insights into ...

Emma Bernard, a curator of fossil fish at the Museum, says, 'Shark-like scales from the Late Ordovician have been found ... The Carboniferous Period (which began 359 million years ago) is known as the ...

But first there was a period of biological regrouping following the disastrous climax to the Ordovician ... drew to a close with a series of extinction events linked to climate change; however ...