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

An Ancient Whale Skeleton, Unexcavated

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A Smithsonian scientist with a whale fossil he excavated
Photo

Panama Expedition Success

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Colorful illustration of extinct Archaeocyatha that lived on the seafloor.
Photo

Archaeocyatha

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A fossil imprint of Ottoia prolifica.
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Ottoia prolifica

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A scientific diagram containing photos and illustrations of the bones and teeth of fossil whales.
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Bones and Teeth of South America's Oldest Fossil Whales

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a squalodontid skull is dislodged after a plaster jacket is applied
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Dislodging the Fossil

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A close up of a sediment core.
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Sediment Core Close-Up

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Squalicorax shark fossil from the Smithsonian
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Squalicorax Shark Fossil

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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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