Close up image of an ammonite fossil shell.


PreviewA rendering of an underwater marine scene from the Cambrian Period, featuring an arthropod, annelids, and other animals.

A Collection of Cambrian Fossils

The ocean during the Cambrian Period was filled with strange and alien creatures. Learn how scientists turn to fossils to recreate ancient seas.

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Are You An Educator?

At Smithsonian Ocean, we have lesson plans, activities, and resources to help you engage your students in the wonders of our oceans.
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