Prehistoric animals roamed all over the Earth. One of the best examples is the fascinating animals found at the La Brea Tar ...

The growth and lifespan of Parvancorina minchami, small anchor-shaped animals that lived on the seafloor about 550 million ...

The Devonian, part of the Paleozoic era, is otherwise known as ... The fossils of these remarkable animals come from the red rocks of Devon. Some lobefins are still around today, such as the ...

With many varieties and sizes—they ranged from a millimeter to more than 2 feet (0.6 meters) in length—trilobites proved among the most successful and enduring of all prehistoric animals.