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Color illustration of an ancient bivalve.
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Elevator Rudists

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An amphipod within Arctic sea ice.
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Amphipod Under Arctic Sea Ice

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An ancient whale ancestor
Video

Evolution of Whales Animation

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Diagram of narwhal anatomy and tusk function
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Narwhal Anatomy

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A screenshot from the video showing a fiddler crab with a large claw.
Video

Claws Out: Fiddler Crabs Do Battle

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A screenshot from the video showing a Palauan primitive cave eel.
Video

Video of the Palauan primitive cave eel (Protanguilla palau)

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Charles Darwin's first diagram of an evolutionary tree appears in his First Notebook on Transmutation of Species (1837).
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Darwin’s Evolutionary Tree Diagram

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A bright-green sea slug with a black background.
Audio

Sea Slugs: One Species at a Time

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Extreme close-up of great white shark skin denticles.
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Biomimicry Shark Denticles

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This family tree shows how the ancestors of whales moved gradually from land to sea.
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The Whale Family Tree

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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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An Illustration of small tentacled fossils.
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Ancient Entoproct Community

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