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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 An Extinct Mammal May Have Been Replaced By Today's Sea Cows

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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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Smithsonian Scientists Dig a Trench Around a squalodontid Skull
Article

Expedition to Excavate a Fossil Whale

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A researcher holds an arm bone from a "toothed" mysticete whale from Vancouver Island.
Article

Dispatches from the Field: Treacherous stream crossings and a new fossil find

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Nick Pyenson points to a skull and skeleton of a fossil whale.
Article

Excavating a "toothed" baleen whale from Vancouver Island

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

Eocene Whales and Penguins Off the Coast of Peru

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Blue whale skull being installed at National Museum of Natural History.
Article

When Did Today’s Whales Get So Big?

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Fossil Whale Digsite at Cerro Ballena, Chile
Article

The Whale Graveyard Whodunit

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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 researchers eat a meal in preparation for a fossil excavation
Slideshow

A Squalodontid Success

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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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