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A chart showing the evolution of cephalopods through geologic time.
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Tracking Cephalopods Through Time

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ichthyosaurs frolic in the waves
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Form Equals Function for Ancient Sea Lizards and Modern Whales

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two polychaete worms side by side
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Pettibone's Polychaete

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Walter Adey and the NMNH coral reef tank
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Walter Adey and Coral Reef Tank

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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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This male dancing fiddler crab (Uca terpsichores) has built a sand “hood” at the entrance to his burrow, which he hopes will attract females to his humble abode—as if that big beautiful claw of his weren't enough!
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The Design of a Beautiful Weapon

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Dr. Stephen Cairns, a Smithsonian research zoologist, studies deep-water corals.
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Dr. Stephen Cairns

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Sea squire illustrations from Ernst Haeckel.
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Sea Squirts

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An artistic rendering of an ocean landscape as it may have looked during the Archean Eon.
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The Archean Eon (4,600 – 2,500 Million Years Ago)

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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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A 3-D reconstruction of the skull of a fin whale fetus.
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3-D Reconstruction Of Fin Whale Skull

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This 1890 painting of Charles Darwin is on display at the Turin Museum of Human Anatomy.
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Charles Darwin

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