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

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A fossil imprint of Ottoia prolifica.
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Ottoia prolifica

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A bright illustration of extinct predator Hurdia victoria.
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Hurdia Victoria

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Fossilezed Hallucigenia sparso with large white spines.
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Hallucigenia

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Smithsonian researchers eat a meal in preparation for a fossil excavation
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A Squalodontid Success

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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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ichthyosaurs frolic in the waves
Article

Form Equals Function for Ancient Sea Lizards and Modern Whales

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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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an ancient worm-like creature with spikes on its back
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Hallucigenia's Spikes

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a group of ichthyosaurs swims at the ocean's surface
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Ichthyosaur Nursery

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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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A rendering of an underwater marine scene depicting life ~145-65 million years ago, when rudist clams were the major reef builders.
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Carbonate Reef (Cretaceous Period: 145 - 65 Million Years Ago)

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