A recent study shows that marine oxygen levels were crucial to the evolution of early Paleozoic trilobite body size, ...

Photograph by James L. Amos The iconic arthropods of the Cambrian were the trilobites, which left a huge number of fossils. Trilobites had flattened, segmented, plated bodies that helped to ...

Currently, the state fossil is the Phacops rana, a type of Trilobite. "It's a bottom feeding Arthropod—which is a bug, and it's very common, found in multiple geological layers," said Mason.

This insight enabled him to use trilobites and other fossils to constrain the position of the continents throughout time. He has died, aged 79. Fortey was born in Ealing in west London and ...