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

The Ocean Throughout Geologic Time, An Image Gallery

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

The Archean Eon (4,600 – 2,500 Million Years Ago)

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A rendering of an underwater marine scene from the Proterozoic Eon, featuring a creature that resembles a jellyfish and other organisms.
Photo

Ediacaran Community, Proterozoic Eon (2,500 - 542 Million Years Ago)

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A rendering of an ocean scene as it may have looked 65 million years ago, when an astroid fell to Earth and triggered a mass extinction event.
Photo

Cretaceous-Paleogene Boundary (65 Million Years Ago)

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Illustration of the Paleozoic shallow water habitat.
Photo

A Mississippian Marine Habitat (359 - 318 Million Years Ago)

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Offshore Peru, during the Eocene (~56-34 million years ago), showing two archaeocetes (ancient whales): Ocucajea picklingi and Supayacetus muizon.
Article

New Archaeocetes from Peru Are the Oldest Fossil Whales from South America

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Color illustration of an ancient bivalve.
Photo

Elevator Rudists

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Color illustration of an ancient bivalve.
Slideshow

Rudist Reefs

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Colorful illustration of extinct Archaeocyatha that lived on the seafloor.
Photo

Archaeocyatha

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An archaeologist arranges a deep-sea core.
Photo

Sediment Cores

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An illustration of a recently discovered species of Monodontid, Bohaskaia monodontoides, and its beluga and narwhale relatives
Article

Smithsonian Scientists Describe a 'New' Fossil Whale

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Notice the pink tentacles, which “recliners” used to filter feed.
Photo

Recliner Rudists

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