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a fossilized ancient sea creature
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Wiwaxia

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A rendering of an underwater marine scene from the Proterozoic Eon, featuring a creature that resembles a jellyfish and other organisms.
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Ediacaran Community, Proterozoic Eon (2,500 - 542 Million Years Ago)

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

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A fossil imprint of Haplophrentis carinatus with two oar-like appendages.
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Haplophrentis carinatus

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Squalicorax shark fossil from the Smithsonian
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Squalicorax Shark Fossil

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Offshore Peru, during the Eocene (~56-34 million years ago), showing two archaeocetes (ancient whales): Ocucajea picklingi and Supayacetus muizon.
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Eocene Whales and Penguins Off the Coast of Peru

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Two men each hold a ceramic vessel at the archaeological excavation
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Archaeologists Study Early Whaling Community in Quebec, Canada

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

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