Illustration of an extinct tentacled sea creature.

Ancient Seas

An artistic rendering of an ocean landscape as it may have looked during the Archean Eon.

The Ocean Throughout Geologic Time

The ocean has gone through some dramatic transformations over time. Take a look at what the ocean may have looked like.

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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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Smithsonian Institution