With eyes like searchlights, a mouth of razor-sharp plates, and grasping appendages ready to snatch anything in reach, this ...

The most familiar and abundant species of trilobites in North America may have followed an exotic survival strategy. Elrathia kingii, found in Middle Cambrian formations in Utah, lived exclusively in ...

In a new study published in the Journal of Systematic Palaeontology, Harvard researchers in the Department of Organismic and Evolutionary Biology, formally describe Helmetia expansa, offering new ...

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.

The fossil expert found love at first sight with trilobites.

Learners will understand that living things have changed over time based on fossil evidence. 1. Download the PowerPoint presentation (PPT 5.9 MB) above. Using the first slide, introduce trilobites and ...

When we find an index fossil in rocks in different locations, it tells us that the rocks formed around the same time. Ammonites make great index fossils due to their rapid evolution and wide ...