Analysis of one Prototaxites species showed that its physical and chemical characteristics were not only different from those of any existing fungus—the didn’t match any existing organism at all.

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 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.

Extinction is a natural part of life on Earth. But occasionally ... The Ordovician-Silurian mass extinction event may have wiped out some 85 percent of species, including many of the invertebrates ...