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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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Two researchers, looking for fossil whales, scan a rock formation in Peru's Pisco Basin.
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Searching for Fossil Whales in Peru

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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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Offshore Peru, during the Eocene (~56-34 million years ago), showing two archaeocetes (ancient whales): Ocucajea picklingi and Supayacetus muizon.
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New Archaeocetes from Peru Are the Oldest Fossil Whales from South America

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A relative of insects, trilobites lived on the ocean floor during the Cambrian period.
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Trilobites

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Smithsonian scientists race the tide the excavate an ancient whale fossil entombed in rock
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Racing the Tide

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A hippopotamus-like creature swims underwater
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Desmostylia

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

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An illustration of a recently discovered species of Monodontid, Bohaskaia monodontoides, and its beluga and narwhale relatives
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Smithsonian Scientists Describe a 'New' Fossil Whale

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Ancient sea cow vertebra found in the Gatun Formation in Central America, Panama
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Ancient Sea Cow Vertebra

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A photo of an arid ocean cliff in Chile's Atacama Desert with the ocean below.
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Exploring Chile's Marine Fossil Record in the Atacama Desert

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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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