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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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Two nurse sharks hover over a baited cage
Lesson Plan

The Puzzle of Ice Age Americans

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400 to 1,000 year old bones from an endangered seabird, the Hawaiian petrel. Bones such as these provide a window into the lives of seabirds before and after human arrival in the open ocean environments of the North Pacific.
Photo

Petrel Bones Help Us Understand History

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Illustration of Opabinia with five eyes and what look like scales.
Photo

Opabinia

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A fossil imprint of Ottoia prolifica.
Photo

Ottoia prolifica

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

A Squalodontid Success

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This jellyfish fossil is from the Cambrian period, more than 500 million years ago.
Photo

Fossil Jellyfish

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

At STRI, No Whales Yet, But There Are Fossil Sea Cows...

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Two nurse sharks hover over a baited cage
Lesson Plan

Fossil Forams and the Scientific Process

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The first known filter feeder is a large shrimp-like creature called Tamisiocaris borealis. The feather-like structures on its head were used to rake plankton from the sea.
Photo

The First Filter Feeder

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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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