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a fossilized ancient sea creature
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Wiwaxia

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An Illustration of small tentacled fossils.
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Ancient Entoproct Community

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

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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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Illustration of a four-legged proto-whale with webbed feet.
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Early Whale with Webbed Feet

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Smithsonian scientists race the tide the excavate an ancient whale fossil entombed in rock
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Fossil Whale Found, Excavated, Jacketed, and Returned to STRI!

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Smithsonian researchers eat a meal in preparation for a fossil excavation
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At STRI, No Whales Yet, But There Are Fossil Sea Cows...

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ichthyosaurs frolic in the waves
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Form Equals Function for Ancient Sea Lizards and Modern Whales

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Two nurse sharks hover over a baited cage
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Fossil Forams and the Scientific Process

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A close-up image of a fossil shark jaw with teeth.
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Shark Teeth Tell Great White Shark Evolution Story

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Two nurse sharks hover over a baited cage
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The Puzzle of Ice Age Americans

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A hippopotamus-like creature swims underwater
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Flippers or Feet? An Extinct Mammal May Have Been Replaced By Today's Sea Cows

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