3 min read The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known. The Cambrian Explosion saw an incredible diversity of life emerge, including ...

3 min read During the Ordovician period, part of the Paleozoic era, a rich variety of marine ... in place of those that didn't survive the Cambrian. Chief among them were the squidlike nautiloids ...

Comprehending the dynamics of pyrite burial and atmospheric oxygen accumulation during the early Paleozoic could shed ...

visitors can follow fossil evidence tracing the evolution of life during the Cambrian period — the first geological period of the Paleozoic era — which lasted from 541 million to 485 million ...

Thus, the emergence and proliferation of early animals from the late Neoproterozoic to the early Paleozoic era (~600–500 million ... During this period, marine oxygenation occurred under ...