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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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A scientific diagram containing photos and illustrations of the bones and teeth of fossil whales.
Photo

Bones and Teeth of South America's Oldest Fossil Whales

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

Illustration of a New Fossil Whale, Bohaskaia monodontoides

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

A Squalodontid Success

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A hippopotamus-like creature swims underwater
Article

Flippers or Feet? An Extinct Mammal May Have Been Replaced By Today's Sea Cows

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Photograph of the model of a Giant Megatooth Shark, taken from the front..
Slideshow

Shark Ancestors

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Smithsonian scientists race the tide the excavate an ancient whale fossil entombed in rock
Article

Fossil Whale Found, Excavated, Jacketed, and Returned to STRI!

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A close-up image of a fossil shark jaw with teeth.
Article

Shark Teeth Tell Great White Shark Evolution Story

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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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A bright illustration of extinct predator Hurdia victoria.
Photo

Hurdia Victoria

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A close-up image of a fossil shark jaw with teeth.
Photo

Teeth and Jaw of an Ancient Shark

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A close up of a sediment core.
Photo

Sediment Core Close-Up

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