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As a semi-enclosed sea, the Mediterranean is very sensitive to pollution.
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The Mediterranean Sea from Space

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Earth as seen from a satellite.
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Earth as seen from a satellite

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Satellite view of Earth.
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A Different View of Earth

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Dr. Carole Baldwin is Curator of Fishes at the National Museum of Natural History.
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Dr. Carole Baldwin

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Like a cake, the ocean has different layers—each with its own characteristics.
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Ocean Layers

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'Blue Marble' satellite image of the Earth
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'Blue Marble' Image of the Earth

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Jorge Velez-Juarbe, predoctoral fellow in the Department of Paleobiology at the Smithsonian's National Museum of Natural History
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Jorge Velez-Juarbe

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Scientists use this box corer to study marine life.
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Launching a Box Corer

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Mangrove roots help to build the peat underlying mangrove islands and protect against erosion.
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Mangroves Protect Against Erosion

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J. Murray Roberts studies and maps the cold-water corals known as Lophelia in the North Atlantic.
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J. Murray Roberts, Coral Scientist

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Gulf Coast of Florida tidal flats exposed by an early morning low tide.
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Low Tide on the Gulf Coast

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