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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.
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Cretaceous-Paleogene Boundary (65 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.
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Eocene Whales and Penguins Off the Coast of Peru

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A rendering of an underwater marine scene depicting life ~145-65 million years ago, when rudist clams were the major reef builders.
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Carbonate Reef (Cretaceous Period: 145 - 65 Million Years Ago)

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A rendering of an underwater marine scene depicting life ~145-65 million years ago, when rudist clams were the major reef builders.
Article

Long Before Coral, Mollusks Built the Ocean's Reefs

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Two men each hold a ceramic vessel at the archaeological excavation
Article

Archaeologists Study Early Whaling Community in Quebec, Canada

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A 3-D reconstruction of the skull of a fin whale fetus.
Article

Keeping An Ear Out For Whale Evolution

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Two nurse sharks hover over a baited cage
Lesson Plan

The Methane Circus

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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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Smithsonian researchers eat a meal in preparation for a fossil excavation
Slideshow

A Squalodontid Success

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An illustration of multispecies communities of dugongs from India, Mexico and Florida
Article

The Discovery of Multispecies Communities of Seacows

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Forams are tiny single-celled organisms.
Slideshow

Foraminifera

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