For most of its history, Earth has existed in a greenhouse state—warm, ice-free, and rich in atmospheric carbon dioxide. The ...

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.

However, in 2018 two University of Cambridge scientists named their paper The Silurian hypothesis ... life has existed on the Earth's land surface." "This short time period raises the obvious ...

The initial radiation of vascular land plants, evidenced by increases in both diversity and morphological disparity during the Silurian and ... During this period, novel structures such as ...