ERN Item Type:
- Classroom Activities
Trilobites were distinctly related to crabs and lived in the sea from 526 million years ago until they became extinct 250 million years ago. There were many different species and 17,000 types of fossil trilobite have been found, ranging in size from only a few millimeters to more than half a meter in length. Many had excellent eyesight.” This activity is great resource for students.