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the skull of a mosasaur
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Meals of the Mighty Mosasaur

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a woman with short black hair and a long necklace of pearls sits in front of a microscope and holds a small button coral
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Joan Murrell Owens and her Button Corals

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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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Great hammerhead in Bimini, Bahamas.
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Sharks

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A narwhal breaches the surface, its tusk pointed to the sky
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Why a Tusk? The real-life unicorns of the sea and the tusks that make them famous

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Nick Pyenson points to a skull and skeleton of a fossil whale.
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Excavating a "toothed" baleen whale from Vancouver Island

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A bull shark's ability to prey on many different species is helped by its capacity to survive in both freshwater and saltwater.
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Smithsonian Stunt Turns Ocean Hall into Living Aquarium

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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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The Belize Barrier Reef Reserve System consists of the largest barrier reef in the northern hemisphere, offshore atolls, and several hundred sand cays, mangrove forests, coastal lagoons, and estuaries. The system's seven sites illustrate the evolutionary h
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Charles Darwin's Ocean Upwelling

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Two Adélie penguins on Paulet Island, Antarctica
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Penguins

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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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