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Giant Pacific Manta Ray, Roca Partida Sea Mount, Revillagigedos Islands, Mexico
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Giant Pacific Manta Ray, Revillagigedos Islands, Mexico

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Which country currently emits the most greenhouse gases? Test your knowledge here.
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Global Warming Quiz

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Sea lion with data collector on back.
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Sea lion with data collector on back

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A frame-by-frame view of a Great White Shark breach- frame 7.
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Breaching Sequence 7

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A frame-by-frame view of a Great White Shark breach- frame 4.
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Breaching Sequence 4

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In Egypt, Dr. Jean-Daniel Stanley of the Smithsonian studies submerged ancient settlements.
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Underwater Archaeology

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Spotfin lionfish in Caribbean waters
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Spotfin Lionfish

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A fox explores a tide pool.
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Fox at the Tide Pools

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A walrus sits on a floating piece of ice.
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Walrus on Ice

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Tree corals like this Calyptrophora bayer can grow several meters high and resemble brightly colored trees.
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Red Tree Coral

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Unlike the shallow tropical coral reef at left, the deep-sea Oculina reef at right does not require sunlight.
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Shallow and Deep-Sea Coral Reefs

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A close-up photo of the seeds on the plant Phragmites australis.
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Phragmites australis, seeds

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