The Cambrian Explosion brought new life and diversity to the ocean. 521,000,000 years ago, the first trilobites emerged in the fossil record thanks to this evolutionary event. With a tough exoskeleton, trilobites were one of the earliest known arthropods and quickly spread across the planet thanks to their incredible adaptability.

This specimen is a 5.428" trilobite Cruziana track fossil recovered from Morocco's Anti-Atlas Mountain Range. Trace fossils like these allow paleontologists to reconstruct a trilobite's movements and anatomy. It dates to the Devonian Period, over 358,000,000 years ago.