3 min read The Cambrian period, part of the Paleozoic era, produced the most ... the world's oceans until they were wiped out in the Permian extinctions about 250 million years ago.

International scientists have uncovered the oldest known phosphatic stromatoporoid sponge, dating back approximately 480 million years to the Early Ordovician, in South China.

The transition in and out of the Late Paleozoic ice age was one of the ... It also paved the way for the rise of reptiles in the Permian period that followed. I lead an international team of ...

The Devonian, part of the Paleozoic era, is otherwise known as the Age of Fishes, as it spawned a remarkable variety of fish. The most formidable of them were the armored placoderms, a group that ...