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 ...

A major fossil site bearing witness to the Cambrian explosion and providing evolutionary evidence for early life-forms, it was deemed one of the most surprising scientific discoveries of the 20th ...

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

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 ...