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.

Prototaxites, an extinct organism from the Devonian period, has been thought to be a fungus since its first fossil was ...

In fact, trees didn’t even exist during the Silurian period, making that conclusion ... Maybe an ancient animal? No animal has ever had cell walls like these. "We found no support for the ...

But trees didn’t yet exist during the Silurian period, so what exactly was this ... It was apparently not a plant, animal, or fungus. “Having found no support for the most widely held view ...