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 ...

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 ...

Here are four animals that managed to persist through Earth’s mass extinction events. Additionally, horseshoe crabs have a reproductive strategy that includes spawning in large numbers ...

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 ...