There are over 7 billion people living on the earth right now. Tens of millions are born and die each year. Every single one ...

So far, so not science. However, in 2018 two University of Cambridge scientists named their paper The Silurian hypothesis: ...

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.

We study trilobites from four periods of the Palaeozoic: the Cambrian, Ordovician, Silurian and Devonian. Our research covers trilobite taxonomy, phylogeny, functional morphology, biogeography, and ...