Many major groups of animals that have become a mainstay in modern times first appeared during the Cambrian Explosion.

The Cambrian Explosion is a landmark moment in the history of life on Earth when many of the major groups of animals first ...

"They're still unpredictable, captive or not." Scary video shows panther ready to pounce after parent risks child's life at wild animal enclosure: 'One of them was about to launch' first appeared on ...

Ancient trackways in seabed mud show animals moved purposefully 10 million years before the Cambrian Explosion.

These are trace fossils from animals that lived during the early Permian, approximately 293 million to 299 million years ago.

Using fossil evidence and genetic dating, geneticists and paleontologists have backed strikingly different candidates for the world's first animal.

Fossil traces reveal traits of prehistoric animals Bennett also analyzed two other trace fossils — from mammals from a more recent time period.

What trace fossils tell us The footprints and tracks left behind by dinosaurs and other prehistoric animals are called trace fossils.