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

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Paleobiologist Mark D. Uhen drills away rock to reveal the fossilized bones of Peruvian archaeocetes (ancient whales), in the Vertebrate Paleontology Department at the Museo de Historia Natural de San Marcos. Uhen is a professor at George Mason Univer
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Preparing a Fossil Whale Specimen

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dugong feeds on seagrass in the Red Sea
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Dugong Feeding

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Smithsonian researchers eat a meal in preparation for a fossil excavation
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Researchers Prepare for a Long Day in the Field

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A rendering of an underwater marine scene from the Cambrian Period, featuring an arthropod, annelids, and other animals.
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A Collection of Cambrian Fossils

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

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Photograph of the model of a Giant Megatooth Shark, taken from the front..
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Shark Ancestors

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A close-up image of a fossil shark jaw with teeth.
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Teeth and Jaw of an Ancient Shark

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

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Fossils of teeth from Giant Megatooth Shark
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Megalodon Teeth

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A fossil of the ancient shark Falcatus falcatus
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The Ancient Shark Falcatus falcatus

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