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

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.
Photo

Biomimicry Shark Denticles

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An Illustration of small tentacled fossils.
Photo

Ancient Entoproct Community

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A 3-D reconstruction of the skull of a fin whale fetus.
Article

Keeping An Ear Out For Whale Evolution

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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!
Article

The Design of a Beautiful Weapon

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A woman standing in front of a barge
Article

Mary Rice: A Force of Nature

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