The Paleozoic era's Silurian period saw animals and plants finally emerge on land. But first there was a period of biological regrouping following the disastrous climax to the Ordovician.

that might be marked as a change in the period on the time scale, such as the transition from Jurassic to Cretaceous 145.5 million years ago. The largest extinction events define a change in era. The ...

3 min read During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the vast seas and the first primitive plants began to appear on land—before the ...

The ancient fish lived about 305 million years ago during the Late Pennsylvanian period of the Paleozoic Era, the New Mexico Department of Cultural Affairs said in a Jan. 10 news release.

As mentioned by TheGodskin's post on Reddit, the Crucible Knights Ordovis, Siluria, and Devonia are named after the Ordovician, Silurian, Devonian periods of the Paleozoic era respectively.