The Paleozoic Era, which ran from 541 million to 251.9 million years ago, was a time of great change on Earth. The era began with the breakup of one supercontinent and the formation of another.

The Cambrian Period is the first geological time period of the Paleozoic Era (the "time of ancient life"). This period lasted from 541 million to 485.4 million years ago, or more than 55 million ...

These members of the class Chondrichthyes, or cartilaginous fish, are survivors from the Paleozoic Era with critical roles to play in ocean ecosystems. Here are 11 facts about the fascinating fish.

The Paleozoic Era is one of the most chaotic times in Earth's history. Find out why! The first era of our current eon, the Paleozoic Era, is probably the most deceptively fascinating time in Earth ...

The best places to see them include Slaughter Beach, DuPont Nature Center, Kitts Hummock and Pickering Beach, but horseshoe ...

Here are 14 dragonfly facts that may surprise you ... Some scientists theorize that high oxygen levels during the Paleozoic era allowed these dragonfly ancestors to grow to monster sizes.

3 min read During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the vast seas and the first primitive plants began to appear on land—before the ...

This time period took place 359 to 299 million years ago. 3 min read The Carboniferous period, part of the late Paleozoic era, takes its name from large underground coal deposits that date to it.