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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.
Photo

Carbonate Reef (Cretaceous Period: 145 - 65 Million Years Ago)

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Fossil mosasaur skull and partial skeleton sitting in what looks like the dirt it was excavated from.
Article

If You Build An Ocean, Sea Monsters Will Come

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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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Illustration of the Paleozoic shallow water habitat.
Photo

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

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A skeleton of an ichthyosaur
Photo

An Ichthyosaur's Bones

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a fossilized jawbone and tooth of an ichthyosaur
Photo

An Ichthyosaur Jaw Bone

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ichthyosaurs frolic in the waves
Article

Form Equals Function for Ancient Sea Lizards and Modern Whales

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

A Collection of Cambrian Fossils

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the skull of a mosasaur
Article

Meals of the Mighty Mosasaur

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serrations from sharks on a fossilized whalebone
Photo

Bite Marks From the Past

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A fossil imprint of Ottoia prolifica.
Photo

Ottoia prolifica

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A screenshot from video showing illustrations of ancient coral reefs.
Video

Coral Reefs Changing Over Time

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