A New and Fascinating Arthropod Fossil

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Scientists have discovered that virtually all fossils found in the Cambrian sediments of the geologic column appear suddenly and are exceptionally preserved. One popular example is the complex, extinct invertebrate called the trilobite, with its thousands of named species.1

 

[Trilobites are arthropods with paired, jointed appendages and] represent a major part of the great evolutionary mystery… More…

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