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 ... "This short time period raises the obvious question as to whether this could have happened ...

Unearthed from stratum from the Silurian Period near Prague, the fossil is comprised of a furcate stem with a trumpet-shaped spore case at its end. Since it has no leaves, the species is believed ...