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Facts about everyone's favorite fossils: Trilobites
Trilobita - Digital Atlas of Ancient Life
Rare Fossils of Ancient Trilobites - YouTube
Trilobite Reveals Lead Up to Extinction | Rock & Gem Magazine
When Did Trilobites Become Extinct? (Are They Alive Today?) - Rock Seeker
Trilobites - Ehmania sp. by Onikaizer on DeviantArt
Trilobites: Fossil Arthropods of the Paleozoic
In Earth’s Greatest Extinction, Land Animals Began Dying Off Long