LOCUST GROVE, Ohio — During a recent day of digging along stream banks, Tom Johnson turned up dozens of trilobite pieces. He squatted for hours, quarrying layers of limestone and shale that had formed ...

Extinct trilobites called Walliserops trifurcatus may have been among the first creatures on Earth to engage in sexual combat, a new study finds. Public Domain At the bottom of the ocean 400 million ...

One of the neatest parts of my job is cataloging and caring for scientifically interesting specimens. Science is based on evidence, and, for geologists, the evidence is in the rocks. If one ...

If you've ever visited the fossil gallery of a natural history museum—or its gift shop, for that matter—you've probably seen the armored body remains (or exoskeletons) of an extinct group of animals ...

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VANCOUVER — Some trilobites scurrying across the seafloor around 500 million years ago probably sported two-lane digestive tracks, new research shows. Michael Rutana of Ohio State University ...

We know a great deal about the diversity, lifestyles and evolution of these iconic invertebrate fossils. More than 22,000 species of trilobite have been named. This is largely because the trilobite ...